recompiled
Prepared a test case for Elia
now we have working sourcemaps
Merge commit '7ca1bde483e7fac5254dc25bc14af58a3184328f' into feature/rackup

* commit '7ca1bde483e7fac5254dc25bc14af58a3184328f':
  now we have working sourcemaps
Merge branch 'feature/rackup' into develop

* feature/rackup:
  now we have working sourcemaps
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