Process Loader queue before frame events in player's main event loop

Testing shows that that's how it is in the player.
Add reftest for Loader.load
Merge pull request #1618 from tschneidereit/master

Execute queued Loader operations before frame events in main event loop
Waits committing frames until initial data is loaded
Merge pull request #1619 from yurydelendik/reftest

Waits committing frames until initial data is loaded
Overlay SWF on top of inspector.
Merge pull request #1620 from mbebenita/overlay

Overlay Flash on top of inspector.
Add inspector option for Flash overlay

Enables toggling the overlay at runtime, too.
Merge pull request #1621 from tschneidereit/master

Add inspector option for Flash overlay
Fixes rAF dependency during reftest
Merge pull request #1622 from yurydelendik/master

Fixes rAF dependency during reftest
Moves failing stas tests into separate file
Merge pull request #1623 from yurydelendik/master

Moves failing stas tests into separate file
Removes Stream usage from the inflate.ts
Removes Stream usage from the URLStream
Fixes URLStream endianess
Workaround to wait for image to be loaded.
Merge pull request #1624 from yurydelendik/uplift-parse

Uplift patches that remove stream.ts usage
Add shell option to laod shell library, this is needed for some AVM2 tests.
A few type annotations.