update creativecommons licenses to version 4.0

[milahu]

currently, the creativecommons licenses have version 3.0

example:

license-templates/templates/cc_by_sa.txt

Lines 1 to 39 in aa0399c

	Creative Commons Legal Code
	Attribution-ShareAlike 3.0 Unported
	CREATIVE COMMONS CORPORATION IS NOT A LAW FIRM AND DOES NOT PROVIDE
	LEGAL SERVICES. DISTRIBUTION OF THIS LICENSE DOES NOT CREATE AN
	ATTORNEY-CLIENT RELATIONSHIP. CREATIVE COMMONS PROVIDES THIS
	INFORMATION ON AN "AS-IS" BASIS. CREATIVE COMMONS MAKES NO WARRANTIES
	REGARDING THE INFORMATION PROVIDED, AND DISCLAIMS LIABILITY FOR
	DAMAGES RESULTING FROM ITS USE.
	License
	THE WORK (AS DEFINED BELOW) IS PROVIDED UNDER THE TERMS OF THIS CREATIVE
	COMMONS PUBLIC LICENSE ("CCPL" OR "LICENSE"). THE WORK IS PROTECTED BY
	COPYRIGHT AND/OR OTHER APPLICABLE LAW. ANY USE OF THE WORK OTHER THAN AS
	AUTHORIZED UNDER THIS LICENSE OR COPYRIGHT LAW IS PROHIBITED.
	BY EXERCISING ANY RIGHTS TO THE WORK PROVIDED HERE, YOU ACCEPT AND AGREE
	TO BE BOUND BY THE TERMS OF THIS LICENSE. TO THE EXTENT THIS LICENSE MAY
	BE CONSIDERED TO BE A CONTRACT, THE LICENSOR GRANTS YOU THE RIGHTS
	CONTAINED HERE IN CONSIDERATION OF YOUR ACCEPTANCE OF SUCH TERMS AND
	CONDITIONS.
	1. Definitions
	a. "Adaptation" means a work based upon the Work, or upon the Work and
	other pre-existing works, such as a translation, adaptation,
	derivative work, arrangement of music or other alterations of a
	literary or artistic work, or phonogram or performance and includes
	cinematographic adaptations or any other form in which the Work may be
	recast, transformed, or adapted including in any form recognizably
	derived from the original, except that a work that constitutes a
	Collection will not be considered an Adaptation for the purpose of
	this License. For the avoidance of doubt, where the Work is a musical
	work, performance or phonogram, the synchronization of the Work in
	timed-relation with a moving image ("synching") will be considered an
	Adaptation for the purpose of this License.
	b. "Collection" means a collection of literary or artistic works, such as

plaintext versions of 4.0 creativecommons licenses:
https://creativecommons.org/2014/01/07/plaintext-versions-of-creative-commons-4-0-licenses/

example:
https://creativecommons.org/licenses/by-sa/4.0/legalcode.txt

Attribution-ShareAlike 4.0 International

=======================================================================

Creative Commons Corporation ("Creative Commons") is not a law firm and
does not provide legal services or legal advice. Distribution of
Creative Commons public licenses does not create a lawyer-client or
other relationship. Creative Commons makes its licenses and related
information available on an "as-is" basis. Creative Commons gives no
warranties regarding its licenses, any material licensed under their
terms and conditions, or any related information. Creative Commons
disclaims all liability for damages resulting from their use to the
fullest extent possible.

Using Creative Commons Public Licenses

Creative Commons public licenses provide a standard set of terms and
conditions that creators and other rights holders may use to share
original works of authorship and other material subject to copyright
and certain other rights specified in the public license below. The
following considerations are for informational purposes only, are not
exhaustive, and do not form part of our licenses.

     Considerations for licensors: Our public licenses are
     intended for use by those authorized to give the public
     permission to use material in ways otherwise restricted by
     copyright and certain other rights. Our licenses are
     irrevocable. Licensors should read and understand the terms
     and conditions of the license they choose before applying it.
     Licensors should also secure all rights necessary before
     applying our licenses so that the public can reuse the
     material as expected. Licensors should clearly mark any
     material not subject to the license. This includes other CC-
     licensed material, or material used under an exception or
     limitation to copyright. More considerations for licensors:
    wiki.creativecommons.org/Considerations_for_licensors

     Considerations for the public: By using one of our public
     licenses, a licensor grants the public permission to use the
     licensed material under specified terms and conditions. If
     the licensor's permission is not necessary for any reason--for
     example, because of any applicable exception or limitation to
     copyright--then that use is not regulated by the license. Our
     licenses grant only permissions under copyright and certain
     other rights that a licensor has authority to grant. Use of
     the licensed material may still be restricted for other
     reasons, including because others have copyright or other
     rights in the material. A licensor may make special requests,
     such as asking that all changes be marked or described.
     Although not required by our licenses, you are encouraged to
     respect those requests where reasonable. More considerations
     for the public:
    wiki.creativecommons.org/Considerations_for_licensees

=======================================================================

Creative Commons Attribution-ShareAlike 4.0 International Public
License

By exercising the Licensed Rights (defined below), You accept and agree
to be bound by the terms and conditions of this Creative Commons
Attribution-ShareAlike 4.0 International Public License ("Public
License"). To the extent this Public License may be interpreted as a
contract, You are granted the Licensed Rights in consideration of Your
acceptance of these terms and conditions, and the Licensor grants You
such rights in consideration of benefits the Licensor receives from
making the Licensed Material available under these terms and
conditions.


Section 1 -- Definitions.

  a. Adapted Material means material subject to Copyright and Similar
     Rights that is derived from or based upon the Licensed Material
     and in which the Licensed Material is translated, altered,
     arranged, transformed, or otherwise modified in a manner requiring
     permission under the Copyright and Similar Rights held by the
     Licensor. For purposes of this Public License, where the Licensed
     Material is a musical work, performance, or sound recording,
     Adapted Material is always produced where the Licensed Material is
     synched in timed relation with a moving image.

  b. Adapter's License means the license You apply to Your Copyright

the creativecommons licenses seem to grow longer with every version...

also the header files should be updated, for example templates/cc_by_sa-header.txt

{{ project }} (c) {{ year }} by {{ organization }}

{{ project }} is licensed under a
Creative Commons Attribution-ShareAlike 4.0 International License.

You should have received a copy of the license along with this 
work.  If not, see <http://creativecommons.org/licenses/by-sa/4.0/>.