Fixing (again) bug with Create Song button/form

* Had forgotten to change the selector in toggleCreateForm, since that turns off the listener for the Create button
* Changed the channel text from "empty" to "available" to be clearer
* Moved the canvas background function call much earlier in loading
small fix to j image to remove white pixels
Merge pull request #52 from artfoundry/fix-create-button-bug

Fix create button bug