first working version using ByteArray.

Attention: unit tests don't run through since I had to change the endianness of the byte array.
removed mistakenly added trace-calls
fixed wrong endian-ness of color
fixed typo
copying last 3 elements of vertex in one single call
avoiding Context3DProfile enum for backwards compatibility (closes #306)
avoiding array push to prevent allocation
fixed erroneous use of static helper vector
clearing byte array early in 'Loader' code path
added missing 'static' declaration
Avoiding array creation side-effects in performance critical areas

On iOS (AOT compiler), Array/Vector.push and  Math.min/max cause the creation of temporary arrays.
more places where 'push' should be avoided
new helper method for AGAL texture lookup flags
first version of DisplacementMapFilter

Beware: doesn't yet work with atlas textures for the displacement map.
avoiding more allocation side-effects
added 'Image.setTexCoordsTo' method
added 'Texture.adjustTexCoords' method
finished DisplacementMapFilter
added missing default value documentation
Include units more often in Tween.as ASDoc