- [Solution for issue #8] add a completion block to - (void)dismissAnimated:(BOOL)animated
- (bis) [Solution for issue #8] add a completion block to - (void)dismissAnimated:(BOOL)animated
- Changed the parameters and variables name to look like - (void)dismissAnimated:(BOOL)animated completion:(void (^)(BOOL finished))completion;
- Some code cleanup
- Restored -dismiss and -dismissAnimated: methods
Update README.md

Explain how to use RNFrostedSidebar with a UINavigationController in Usage section.
Merge pull request #21 from kvting/master

Proposed solution to issue #8