Fixing bug in which clicking Public in the Create Song form while a song name was entered would create the song

* Listener was on entire form div, so clicking the public button would trigger it
* Removed the form tags
* Replaced input field with plain button for Create button
* Changed listener to listen just to the Create button
* Changed serializing to use the song text field directly instead of entire form ("this")
Merge pull request #51 from artfoundry/fix-public-button-bug

Fixing bug in which clicking Public in the Create Song form while a song...