First attempt to query typeahead using resource.

Doesn't seem to work as it returns a promise object.
Instead, we might want to try to use $http directly
Added first working implementation of source-selection with typeahead.

It works nicely, and looks quite well too. Having a tree would be
even better, but for now it's good enough.
In order to make it work with destinations sans code duplication,
this code should be made into a directive.
turned path-input into template, which seems to work nicely.

However, there is so much more about directives I have understood
only partially at best. At least I know the basics, with the option
to expand on this knowledge one day.
Now we can actually run godi from the web-frontend and see updates in real-time