Improved selection approach when changing the selection
initial steps to play selection
More play from selection: play button now plays from the beginning of selection
other by command (see commands)
some refactoring
made handling of visibility (mainly applied for rests) consistent in Song / Layout
removed superflous code
First shot of dropbox support
started to work with promises
simplified to use promise ststy
now we provide our own instance of dropbox.min.js
further refactoring the dropbox-js wrapper
merge save_in_dropbox to develop
rake file now supports backup
update to abcja 1.12
now we have dropbox in two flavors - dropbox app folder only  and dropbox - full access
initial version of command-controller and command definitions
now all commands are converted to the command-controller approach
Merge branch 'feature/command_architecture' into develop
Now have a creation note on every sheet
Improved version management
Slightly refined layout
let the print-configuration select the voices to consider for vertical layout
now dsave saves all excepts according to the print configuration
Rake now compiles a a deployment folder which should be copied to the web server
No longer use icons in the toolbar
fixed message indlogin
rake deploy now delivers a minimized build.js