v1.2.2

Replaced direct call of "layoutSubviews" by "setNeedsLayout".
Got rid of the extension .md of the "LICENSE" file for CocoaPods.

v1.2.1 - Getting project ready for CocoaPods

- Renamed the folder "BEMSimpleLineGraph" to "Classes".
- Modified the documentation to reflect the change of name.

Merge branch 'master' of https://github.com/Boris-Em/BEMSimpleLineGraph