deposit: usage of requirejs for typeahead
deposit: usage of requirejs for typeahead

* Makes form.js using twitter typeahead through a requirejs
  dependency.

Reviewed-by: Javier Martin Montull <ea6b80e26c65acc242d8916fb6eefa01b123cb69@cern.ch>
Signed-off-by: Kamil Neczaj <f5effa4f8fb04510feb8c36db9502b05ce6bf54d@cern.ch>

inveniosoftware/invenio-deposit,inveniosoftware/invenio-deposit,inveniosoftware/invenio-deposit,inveniosoftware/invenio-deposit