Modify Links model to generate GetCapabilities links for WMS, WFS, WCS services

Update template full_metadata.xml for ISO XML to include these links
Restored 'OWS' link, but with added params for GetCapabilities response
add group email, hide manage commands, group logo css
revert css change b/c of less issues
PEP8 fix
fixed whitespace
Merge pull request #1648 from state-hiu/groups_fix

Group Enhancements (Email, Tags, Fixes)
Revert to bare WMS, WFS, WCS URLs in base_link, update gmd:protocol and other element values in ISO template
Merge branch 'master' of https://github.com/GeoNode/geonode
Merge pull request #1633 from mwengren/link_fix_pr

Modify Links model to generate GetCapabilities links for WMS, WFS, WCS
remove query string prefix
add tests, remove erroneous link add __str__ for Link class
remove commented out code
remove unused var
remove unused var