Adding in the new load notation with regards to issue #1.
Moving the note volume node to the instrument instead.  This should free up some memory and make it more efficient.
Merge branch 'master' of https://github.com/meenie/8bit.js into feature-json-loading
Merge branch 'master' into feature-json-loading
Default onFinishedCallback

By default, the onFinishedCallback is undefined, which can give errors when play() is finished. Line 68 now checks to make sure cb is a function.
Merge pull request #12 from Diogenesthecynic/patch-1

Default onFinishedCallback
Merge branch 'master' into feature-json-loading
Merge branch 'feature-json-loading' of https://github.com/meenie/8bit.js into feature-json-loading
Putting in some comments for the new load functionality and updating the docs.
Bumping up the version and fixing a quick bug in the new load functionality.
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'