Merge pull request #1522 from mbebenita/avx

Update makefile.
Adds iframe fallback back on the main page
Proper check if button state label is defined
Moves easelHost into Shumway.GFX
Merge pull request #1523 from yurydelendik/mv-easelHost

Moves easelHost into Shumway.GFX
Fixes shell references
Moving headless SWF execution to the shell.ts
Merge pull request #1527 from yurydelendik/runswf

Moving headless SWF execution to the shell.ts
Stubs window.screen for the shell.ts
Merge branch 'runswf'
Fix hit testing on buttons created from symbols
Merge branch 'master' of github.com:mozilla/shumway into nat
Proper check if button state label is defined
Fix hit testing on buttons created from symbols
Merge pull request #1528 from tobytailor/master

Button fixes
Run smoke tests in parallel.
Fix JPEG decoding when chunked.
Merge.
Fix ContainsFrameScriptPendingChildren propagation
Merge branch 'master' of github.com:mozilla/shumway