Basic cleanup based on a completely new logic.
Now the main Gruntfile will just call sub-grunts per project.

It will also have the ability to create new apps and to init them by installing needed packages and bower components.
Move this to a better appropriate folder.
Merge old config structure to this one.

config.json + data.json => app.json
New different packages needed by main Grunt tasks.
Apps now can be (finally) configured independently.