Update code, update website and add Colab

Information about the release can be found in the README.md section 'Version 0.3.15'.

cadmus v0.3.14

Update code, and add keywords. See subsection 'version 0.3.14' in the 'version' section.

cadmus v0.3.13

Update code to add elsevier_api_key and

wiley_api_key, changes are reflated in the readme and
version 0.3.13

cadmus v0.1.2

Update code to add elsevier_api_key and

wiley_api_key, changes are reflated in the readme and
version 0.3.13

cadmus v0.2.0

• updated to reflect changes in NCBI computational access requirements - including eDirect
• bug-fixes and extensive performance improvements

First Release of Cadmus

This is the first official release of Cadmus.