update installation guide for osx (10.6->10.7)
snow leopard -> lion
core:Factory raise Attribute if trying to access attributes like `bind`
core:WeakMethod test for reference error raised on python3
doc: revisions to graphics/shader.py
doc: revisions to graphics/stencil_instructions.pyx
doc: revisions to graphics/texture.pyx (1)
doc: revisions to graphics/texture.pyx (2)
doc: revisions to graphics/texture.pyx (3)
doc: revisions to graphics/texture.py (4)
doc: revisions to graphics/texture.py (4)
doc: revisions to graphics/texture.pyx (4)
doc: revisions to graphics/texture.pyx (5)
doc: revisions to graphics/transformation.pyx
doc: revisions to graphics/vbo.pyx
doc: revisions to graphics/vertex.pyx
doc: revisions to graphics/vertex_instructions.pyx
doc: revisions to graphics/vertex_instructions.pyx
uix:ActionBar fix comparison ref: #1729
setup: avoid gstreamer to be used on mobile (android and ios)