update test to cleanup listener. fixes for #945
readme.md: remove sync return value from JS API build example

fixes #1143
Merge pull request #1145 from jonathanong/patch-1

readme.md: remove sync return value from JS API build example
Merge pull request #1018 from patrickkettner/video-autoplay-edits

update video autoplay test to cleanup listener. fixes for #945
Adds UA blacklist to @font-face test as a stopgap.
This addresses the issue of false positives on WebOS, Android 2.0/2.1,
and Windows Phone 7-7.8 while we consider a more robust feature test.
Ref. #1120.
Merge pull request #1147 from Wilto/master

Adds UA blacklist to @font-face test as a stopgap for false positives
Add support for Blob constructor in blobworkers test since BlobBuilder is deprecated and has been removed from firefox