Add language links to developer.o.o front page
Add language links to developer.o.o front page

refresh index page with better structure

* added language links for firstapp-libcloud
* added language links for firstapp-shade
* added language links for api-guide/quickstart
* fix list structure at the end of the page

Change-Id: Ieea4c92bd86a3f6006e1827e84ccfbed45ac8931

openstack/api-site,openstack/api-site,openstack/api-site,openstack/api-site