Merge pull request #31 from uxebu/preloader

Remove existing `AssetController.preload`
Merge pull request #32 from uxebu/isWebkitPatternBug

Is webkit pattern bug
Fixes #33 (thx @jdalton)
This should fix an issue where IE 10 throws an error when `undefined` is passed as second parameter (ReferenceElement) to `parent.insertBefore`.
changelog
Fix #30
Fix #36
A bug in svg-renderer where filters couldn't be removed.
Fix a bug where the filter-attribute wasn't removed
s/worker/RunnerContext
Merge pull request #38 from uxebu/fix-remove-filters

Fix a bug where the filter-attribute wasn't removed
Fix a bug where Bitmaps couldn't be updated via "source"
add a "preloader-plugin" example movie
use `tools.forEach` instead of ES5's `foreach`
change `play`'s signature and remove parameters.
align tests and `animate` method
remove `setSubjects` and `setSubject` methods
modify simple animation example movie
changelog
minor typo
remove comment
Merge pull request #39 from uxebu/cleanup-animation

Cleanup animation