Break scene.transforms into subpackage
Rename Transform => BaseTransform
Fix unit test
Added note about basetransform - chaintransform cyclic import
Make transform imports explicit
flakify
Add scene.transforms to setup.py
Implement (partly) proper way to inherit from Entity

That is, each Subclass does `__init__(what=None, I=3, need=3, **kwargs)`
and then `SuperClass.__init__(self, **kwargs)`

Also fixes to Text class and SceneCanvas can be other bgcolor than
black :)
Merge pull request #377 from lcampagn/transforms-subpackage

Break scene.transforms into subpackage
Address reviewer comments

I incorporated changes from #358, so that when that PR gets
rebased, it should result in minimal clashes.
flakify
Adds egl API

It is not 100% complete and the code to load the lib should
be generalized, but this should be a good starting point.
I had a working demo with this some time ago.
Make ipynb_vnc not tested
Merge pull request #381 from almarklein/lib-egl

Adds egl API
address comments
Merge pull request #378 from almarklein/entity-inheritance

Implement (partly) proper way to inherit from Entity
WIP: mplexporter / pyplot interface
FIX: Py3k
FIX: Quieter nose
FIX: Cleaner example [ci skip]