Changed MpqBufferStream threading model to sync properly
Initial read can be async, subsequent will be on the caller's thread
Added additional tests for file which has a larger than single sector header
Changed AssetContainer#dependencies to AssetDesc[]
This allows containers to be more flexible for lookup and exception handling
Changed Array<AssetDesc> members to AssetDesc[] for simplicity
AssetLoader functions will now notify passed Promise of exceptions
Changed DcParams#combineFrames from boolean to int [-1 (auto), 0 (don't combine), 1 (combine)]
Added boolean combineFrames argument to Dc#uploadTextures()
Created Dc#numPages() to support combined frames
Defined Dc6#PAGE_SIZE and changed constants to reference it
Implemented combined frames into Dc6 (Dcc unsupported)
Refactored subclass fields into Dc#MISSING_TEXTURE
Created Dc#box() methods
Improved DccLoader test cases with asset failure to load test case
Changed AssetManager#load(AssetDesc) return type to Promise
Created classes to handle class load exceptions
Created AssetLoader#validate(AssetDesc) to validate asset desc
Changed asset types to bounded wildcards for polymorphism (test)
Created Dc6 file codec and Dc6Decoder and tests
Amended Dc to remove Dc#dirOffsets and use virtual method instead
Dc6 implements offsets for each frame and therefore requires a bit of specialization
Refactored Cell impls to data-oriented-design approach
Added Dcc#MISSING_TEXTURE to set as the unloaded texture value
Added Dc#direction(int) to obtain the Dc.Direction
Removed old Dcc code which is no longer needed
Added accessor field for PaletteIndexedPixmap Pixmap.Format value
Added RiiabloTest#clearGdxContext() to reset Gdx fields to null
Fixed issues with LWJGL test cases not supporting more than 1 iteration
Enabled additional parameterized test cases for DccDecoderTest
Created test cases for DccLoader in DccLoaderTest using AssetManager
Removed FileHandleResolver field and accessors from AssetLoader
Added Palette decoder and PaletteLoader
Fixed issue where releasing Dcc direction was releasing all directions
Dc now implements ReferenceCounted and increments for each direction read
Removed FileHandleResolver field from AssetLoader (handled by AssetManager)
