Added a drop shadow with blur radius (using guassian blur).
Made fixes to Blur/Bloom effect, users can now set whatever blur radius they want.
Merge branch 'develop' into effects
Got a basic distance field effect working (still tinkering with unfiroms)
Added distance field effect test (a sandbox for trying different things with distance fields).
Next: I'm going to create a couple of concrete/specific effects that utilize distance fields.
df outline - WIP
Added distance field outline effect.
outline effect - made sure to set the field scale factor with user paramater instead of hardcoded value.
Merge remote-tracking branch 'upstream/effects' into develop
Fixed compilation issues for headless.
Mdae some progress on a DistanceField outline effect. (works as is, I'm still keeping in hidden under experimental until I figure out how to package the tool).