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 ...

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

Likely to fix:

• https://github.com/viezel/NappDrawer/issues/86
• https://github.com/viezel/NappDrawer/issues/154
• https://github.com/viezel/NappDrawer/issues/92
• https://github.com/viezel/NappDrawer/issues/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 :)