github: gitignore fix

* Fixes isues where .gitignore where ignoring badge template PNG file.

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
base: format element translation fix

* Fixes translations string in bfe_openaire_authors format element.

* Fixes some PEP8 and lint issues.

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
base: ranker configuration move

* Moves ranker configuration so that it can be discovered from the respective
  registry.

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
github: creator extraction fix

* Fixes issue where creator extraction would fail when a repository did
  not have any contributors.

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
github: hook creation fix

* Fixes issue with hook creation when non-web hooks was installed.

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
base: deprecated assets removal

* Removes boostrap, hogan and jquery assets that conflicts with Invenio
  assets.

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>