use container-fluid for the toolbar

With class container buttons will disappear to a not visible area
when resizing the interface smaller (smartphones).
In OERPUB we also use more buttons than atc
and exceeding the bootstrap container size of 940px.
Use /workspace instead of /api/content to load content
Fix new module links in sidebar
Merge pull request #93 from Connexions/fixes

Use /workspace instead of /api/content to load content
Save new models
Ignore empty links
Downgrade to bootstrap 2.2.2; Ignore empty links
Merge pull request #94 from Connexions/fixes

Save new models correctly
Merge pull request #91 from oerpub/toolbar-responsive-ui-fix

use container-fluid for the toolbar