Add tile sheet methods.
Use correct error domain.
Add CocoaYAML as a submodule for parsing.
Add CocoaYAML to Xcode project.
Rename app delegate class.
Fix comments.
Add initial code for loading a tile sheet.
Use correct class prefix.
Add CMPV1MapSerializer.
Store map size.
Append map version to buffer.
Append map size to buffer.
Add in extra memory management stuff.
Use correct type.
Serialize actual layers.
Add CMPV1MapSerializerTests.
Merge branch 'master' of https://github.com/gjb7/it-276-compass into editor

Conflicts:
	Compass.xcodeproj/project.pbxproj
	Compass/Classes/Controller/GJBProjectsViewController.m
	Compass/Classes/Model/CMPMap.h
	Compass/Classes/Model/CMPTilesheet.h
	Compass/Classes/Model/CMPTilesheet.m