React Sidemenu Versions Save

Bug fixes. Adding possibility to control menu from code. Example project update.

Updated library to support React v16.0.0.

Merged pull requests and updated React Native version issues (PropTypes, CreateClass).

This update enables:

• property 'shouldTriggerClickOnParents': enables onMenuItemClick method being called on parents (previously it was called only on items without children)
• onClick method: enables to define custom onClick handlers (overriding global onMenuItemClick)