Merge pull request #84 from kevmoo/master

A number of tweaks
Matrix.transformPoint should take a math-Point
Moved ColorTransform out of the geom library
Ignore build folder
Fixed ColorTransform
No tools library for now, maybe later
No tools library for now, maybe later (2)
Added Kevin to authors
Removed deprecated x/y from rectangle test
Revert stagexl.geom mini-library.

With the next release of StageXL we will create more mini-libraries for
animation, engine, geom, media, etc. This involves more refactoring so
we postpone it for now.
Fixed and renamed Juggler purge/clear method
Added contains methods for ResourceManager
Update AUTHORS.md
Deprecate Rectangle.union

and moving some methods around for better readability.
Version 0.9.2+1