Added an addSong method to the MushaManager/Connector so that a new song can be added to the active user's license library through the user's admin panel
Merge branch 'master' of https://github.com/woodbury/Musha into philsTesting
added Exception to addLicenseRecord method instead of println message (doesn't work with current UI because adding song doesn't handle exceptions yet)
Merge branch 'master' of https://github.com/woodbury/Musha into philsTesting
added error checking in UserLibrary Class, rearranged MushaClassDiagram for readability