Fix NumKeys bindings

This commit fixes hardcoded keybindings. Now:
- Num keys bindable independently from F1-F8 keys
- NumPad keys bindable independently from arrow keys
- NumPad numeric keys decimal codes (NumPad0 - NumPad9): 310 - 319

Example (keyconfig.plist):

	key_roll_left				= 314;		// NumPad4
	key_roll_right				= 316;		// NumPad6
	key_pitch_forward			= 318;		// NumPad8
	key_pitch_back				= 315;		// NumPad5
	key_yaw_left				= 317;		// NumPad7
	key_yaw_right				= 319;		// NumPad9
Possibility to custom bind GUI arrow keys

This commit fixes hardcoded binding for arrow keys. For example for those
players who want move GUI cursor by NumPad arrows now is possible make
binding in keyconfig.plist.
Fix wrong key code for "3" key on windows
Begin work on OXZ support

OXZ files are detected by ResourceManager and added to search paths. Plist files may be read from there into NSData objects.

Other file types not yet supported for reads from OXZ.

License files updated to include MiniZip license.
Get other files to load from OXZ too, some cleanup
SDL support for sound in zip files

Music appears to only be possible to stream from regular files in SDL - no in-memory, no streams. Hmm.
Start work on OpenAL support

(Really doesn't work as of this commit...)
Merge branch 'master' of github.com:OoliteProject/oolite into zipped-oxp-support

Conflicts:
	GNUmakefile

Merge upstream now or this will be messy later with the windows deps
Getting closer, but sound now cuts out half-way through playback
Track sample lengths properly
Music now works as well.

Reading sounds from oxz sort-of works, until it needs to be replayed. Can't really seek from the ZIP stream easily, so will need to work around it
Fix various issues with looping and replaying of sounds.

Sounds and music now readable from OXZs just as from disk
Add zip support files to Xcode project
Fix MiniZip build issues under Mac OS X
Fix OOOpenALController build issues under Mac OS X

Also, repurposed OOOpenAL.h to be broadly equivalent to OOOpenGL.h
and OOCocoa.h.
Add missing resources to Xcode project
Fix more Xcode 5 project issues

I thought I'd done these, but apparently not.
Fix various warnings in Xcode 5
Fix missing symbolic identifier in OOLogHeader
Merge remote branch 'origin/master' into zipped-oxp-support