Code refresh + SPM support (#848)

* SPM first attempt

* upgrade Example project to XCode 11

* Upgrade to official FXPageControl package

* Upgrade FXPageControl to 1.6

Merge pull request #701 from xmartlabs/swift5

minor readme change

Merge pull request #673 from xmartlabs/version/8.1.1

readme update

Release version 8.1.0 (#639)

8.0.1 version

* Adds support for Xcode 9 (Swift 4).

* Bug fixes and stability improvements.

Merge pull request #311 from xmartlabs/version/7.0.0

new 7.0.0 version

release version 6.0.0

release 5.1.0

Merge pull request #148 from xmartlabs/version_5_0_0

Xcode 7.3 support. Now Swift 2.2 is required.