Refactor iOS project

[hansemannn]

Hey @viezel!

The community is still in love with this module, so I decided to do a quick update.
So This PR attempts to ...

• Rebuild the module with latest 7.0.1. GA (not required but helpful)
• Remove old meta-data (placeholder for license, changelog and old python scripts)
• Add a LICENSE to the module root
• Fix all static analyser warnings (unused properties, dead-assignments)
• Move the project to ARC
• Fix all memory leaks (some in the static analyser, some because of ARC)
• Lint the iOS-source to match a more modern and unified code-style
• Improve the compatibility with the iPhone X and future-devices (based on Update MMDrawerController.m mutualmobile/MMDrawerController#504)
• Expose centerWindowDidFocus and centerWindowDidBlur event on the drawer
• Bump the version to 2.0.0 to indicate the major changes

Likely to fix:

• drawer.close() memory leak #86
• Not compatible with Titanium SDK 4.0.0 #154
• App crashes when using drawer.close() IOS 7.1 #92
• Bug: centerWindow doesn't fire open or focus events on iOS #37

Binary: dk.napp.drawer-iphone-2.0.0.zip

[viezel]

@hansemannn wonderful!!
I just added you as a contributor (as you are far more active than me in appc). Let me know if you want access to other repos :)