add missing Brush reference in tween.js
Merge pull request #243 from Animatron/play-572

add missing Brush reference in tween.js
do not hide controls on mouse leave except when playing/paused
Merge pull request #244 from Animatron/play-573

do not hide controls on mouse leave except when playing/paused
add missing utils ref to brush.js

(also linter fixes)
Merge branch 'develop' into docs

Conflicts:
	src/anm/graphics/brush.js