Enable building of translated manuals

This is the initial setup to build translated manuals. For now only the
api-quick-start is build.

This needs openstack-doc-tools version 0.13.

Change-Id: I140b8007d76bda5f436cbd80e77b890852c71827
Imported Translations from Transifex

Change-Id: I448187e7a0acdb127f2ac5789bf6b114abb5fea3
Merge "Enable building of translated manuals"
Merge "Imported Translations from Transifex"