Progress update to particle system creation.
Don't clear the curves collection on curves through points.
Make permanent renderables dictionary on controller.
Change intermittent update to requestsredraw.
Clear renderables and reset particle system when size of system changes.
Cleanup dead methods in particle system code.
Small change to UV grid to ensure we get to edges of domain.
Merge branch 'master' of https://github.com/ikeough/Dynamo