Added profiling command line flag
ModularProgram now correctly triggers ModularVisual.update
give SceneCanvas symbolic Entities to represent ndc, fb, and lpx coordinate systems
Break scene.transforms into subpackage
Merge branch 'transforms-subpackage' into transform-cache

Conflicts:
	vispy/scene/transforms.py
Rename Transform => BaseTransform
Fix unit test
Added note about basetransform - chaintransform cyclic import
Make transform imports explicit
flakify
Add scene.transforms to setup.py
Implemented basic transform caching; testing needed.
Corrections to SceneEvent transforms
Merge pull request #377 from lcampagn/transforms-subpackage

Break scene.transforms into subpackage
Fixed transform issues; more testing needed
Fixed transform cache handling
Optimization
Fixed bugs
Merge branch 'master' into transform-cache

Conflicts:
	vispy/scene/transforms/__init__.py
Imitial import of glagg line visual from Rossant and Rougier.