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.
begin integration with github
clean index function. cache and retrieve repo data
fix repo name in template
storing hook state
remove hooks and update entry in db
add and remove hook feedback
writing handler to accept gh releases
test payload with zenodo endpoint
creating depositions on zenodo
sync repos
sync repos
uploading archive and publishing
store the doi and modified date
add doi and modified to page
Merge remote-tracking branch 'amit/next' into next