Merge pull request #1 from alexanderzeillinger/master

Thanks, I had just noticed that I missed that, although I'm still trying to solve another issue where the background colour affects the transparency when using the webgl renderer.
Switched the dirty flag to be private.
More work on the tiling sprite but not working in webgl just yet.
Updated version and switched dependencies to any.
Fixed a linked list problem with display object insertion.
More on the tiling texture (but still not working).
Added a recursive vs flat render benchmark.
Add circle class