[changes made to FTK 2.5.1]

---FLARToolkit source changes---

FLARMultiMarkerDetector.getDirection()
	added

FLARMultiMarkerDetector.getSquare()
	added

FLARMultiMarkerDetector.thresholdedBitmapData()
	added

to commit these changes, i have to first update to the newest version of
FLARMultiMarkerDetector, which breaks DetectSquareCB out into a separate class file,
MultiDetectSquareCB, and also appears to have support for variable marker width
(changes in initInstance()).




---FLARManager source changes---

IFLARSource.set source()
	added

FLARCameraSource.set source()
	added
FLARCameraSource.init(), .update(), .dispose()
	changes to accommodate FTK 2.5.1's requirement that it instantiate the source BitmapData
	
FLARLoaderSource.set source()
	added
FLARLoaderSource.init(), .update(), .dispose()
	changes to accommodate FTK 2.5.1's requirement that it instantiate the source BitmapData


changes to GeomUtils and SimpleCubes for each 3D framework,
to correspond to datatype changes in FTK 2.5.1