add more side menu animation styles

[gran33]

No description provided.

[gran33]

@talkol
Some updates:

• Merge issue How to disable press event on swiping? #18
• Share common code between the 2 drawers to avoid code duplication (RCCDrawerHelper object with public methods only, no instances on RCCDrawerHelper)
• Reorder the Drawers files (1 directory to all files related to the drawers)
• Add props support gestureMode="false/true" to avoid open/close the drawer via pan gesture
• Add props support showsShadow="false/true" to show/hide the small shadow strip in the drawer
• When drawer is open, the content screen (the one that pushed by the drawer) have a dark overlay only when drawer is open/close via the button (no gesture support yet, soon to come)
• When drawer is open, the status bar is hidden only in the more... options (it's completely different type of drawer), have some conflicts with the RCCViewController functionality

I'll invest some more time to complete this pull request as fast as possible.

[drorbiran]

Hi, we wanted to update you that we are currently postponing the processing of pull requests.
Please refer to React native controllers evolution, we'll appreciate your feedback.

[DanielZlotin]

@gran33 Is this PR fixing bugs? or features? Did you push it manually or something?