remove token file if Dropbox authorization revoked
support for quitting xbmc after scheduled backup
added dropbox key/secret settings
vfs.py should pull dropbox info from settings
added message to create Dropbox key/secret
fixed shutdown function in scheduler.py
updated readme and changelog
updated xbmc python version
will now check for arguments "backup" or "restore" to bypass dialog prompt
Merge pull request #27 from robweber/master

update testing