Added global method for checking for use of Web Audio API
Documented how to check for use of Web Audio API.
Merge remote-tracking branch 'upstream/master'
Fixes issue #15 now audio keeps playing for non-sprite HTML5 audio
Revert "Added global method for checking for use of Web Audio API"

This reverts commit 9d815ca33f454947bac1dd5baab0fc5067c33df2.
Revert "Documented how to check for use of Web Audio API."

This reverts commit b4b9d1ad38a4c2867514126cc1b2e0fe2ef66029.
Revert "Fixes issue #15 now audio keeps playing for non-sprite HTML5 audio"

This reverts commit c43060a7452237c6ae9626b70362cc9146b6dedc.
Fixes problem where non-sprite HTML5 audio clips become unplayable

Fixes github issues #15 and #16
Merge pull request #17 from PaulMorris/non-sprite-files-stop-being-playable

Fixes problem where non-sprite files stop being playable