Add support for LineDashedMaterial in CanvasRenderer
Detect Python version when running build.py script and let user know the script won't run in Python < 2.7, suggest a download link, then quit
Fixed example filename.
Merge branch 'master' into dev
Merge remote-tracking branch 'sole/dev-build-python-less-than-2.7' into dev
Friendlier message.
Simplified CanvasRenderer line dash code.