base: removal of font awesome

* Moves Font Awesome to Invenio and installation via
  bower.json.
deposit: upgrade of font-awesome to version 4

* Upgrades deposit icons to Font Awesome v4.
deposit: template and bootstrap 3 fixes

* Fixes some template issues as well as bootstrap 3 issues.
global: travis and requirements updates.
Merge remote-tracking branch 'amit/next' into next