Make player files saving again
Make sure none of the irrlicht member objects of GenericCAO are deleted prior deletion of GenericCAO
Add formspec api versioning
Fix msvc2012 build
OS X compatibility fixes
Glasslike_framed drawtype rework.
Don't spam server console on player/playersao error but just drop the affected client
Add support for Android 2.3+

There have been plenty of ppl involved in creating this version.
I don't wanna mention names as I'm sure I'd forget someone so I
just tell where help has been done:
- The partial android versions done by various ppl
- Testing on different android devices
- reviewing code (especially the in core changes)
- testing controls
- reviewing texts

A big thank you to everyone helping this to be completed!
Copy zlib and freetype dll to windows package too
Add redis options to documentation