README clarifications
Docs and code standards
Fix display method.

The end of line comment is to avoid the false positive coding standards check, as per https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards/issues/13#issuecomment-17506323
Create view classes.

Adds support for allowing any calendar data to be displayed in different views. Only the classic grid view is currently implemented (which is broken down into lots of small method so the class can be extended to add small variations).
Merge branch 'develop'