Changed header comment blocks in render2d classes.
Added test view classes for render2d.
Changed internal namespace for render2d system.
Replaced string occurences to Render2D.
One more small string replacement in Transition2D class.
Organized imports in render2d classes.
Applied standard formatting to all render2d classes.
Removed ColorUtil2D class. Instead uses the ColorUtil class from
hexagonlib.
Removed getNextPowerOfTwo2D util method. Instead uses hexagonlib
version.
Moved VertexData2D class to core package.
Added latest hexagonlib.
Removed render2d.util package and classes. render2d now uses the
util classes and methods from hexagonlib.