Expose getMemoryUsage as player method to python.

Deprecating avg.getMemoryUsage as of 1.9.0
Adjust removal comment
Expose pointInPolygon as avg.Point2D.isInPolygon

Finish item on #291
Depcrecate avg.pointInPolygon
Kill mathutil

Moving only internally used function to utils.py; Rest is undocumented anyway
Allow Keyword-Arguments for BlurFX; Fixes #413
Merge pull request #509 from libavg/features/#291_kill_mathutil

Kill mathutil
Make FXNodes accept keyword arguments;
[fixes #413]
Merge pull request #507 from libavg/features/#291

Features/#291: Point2D::isInPolygon and Player::getMemoryUsage
Merge pull request #510 from libavg/features/#413

Features/#413: FXNodes accept keyword constructor params
Fixed warning
Add Test for TransformRecognizer failing when disabled in Up Event
TransformRecognizer: Fix crash when disabled in up (#512).
Merge pull request #514 from libavg/bugfixes/#512_transform_recognizer_2

Bugfixes/#512 transform recognizer 2
Implement weak referencing for subscriber info using c-api
PreProcessor Directive indentation
Make Bitmap.getPixels return a Python ByteArray/MemoryView instead of a string of pixels
Adjust plugin interface
Adjust firebirds sample
Allow explicitly setting ShaderUsage==FULL on Macs with Intel graphics.
Throw an exception in Publisher::subscribe if callable parameter is neither a callable nor None.