This broke the pan gesture

This reverts commit 74b55f84291bc1868171888a3a7de282fff39021.
Add fix provided by @SpruceGoose429 to make ECSlidingViewController work in iOS 8
Call super instead of returning nil. Thanks @fcy!
Use getter
Version bump
- Merging 2.0.3 ECSlidingViewController from upstream to our fork.