fixed ignoring of sencha_backup folder
upgraded app to sencha cmd 4.0.4
fixed leaflet library access with window.L
fixed another leaflet library access bug
upgraded sencha cmd to 4.0.4.84
clear localStorage if needed (cmd 404 upgrade fix)
new production build
Merge pull request #78 from kort/cmd404

Upgrade to Sencha Cmd 4.0.4.84