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.
Merge remote branch 'origin/master' into zipped-oxp-support
[Mac] Add type information for OXZs
Fix another build warning in MiniZip
Cleanup as suggested
Correct OOSoundInternal.h for OpenAL
Deal with Clang warnings in OpenAL code
Use OpenAL in Mac builds
Disable sound.buffer logging by default