Added upload form at #/upload
We even got animationz.

TODO:
- change css of upload form
- add http://angular-ui.github.io/bootstrap/ "Collapse" under files when we wish to delete them instead of opening a new page
- add forms under the files we wish to upload that will contain "Artist", "Title", "Album", "Description", "Tags", in that order; Artist and Title must be mandatory
- add file size and type restrictions