Added the blocking user feature. Followers and followings section will now display a "No one follows..."/"Is not following anyone" text in case the user does not follow anyone or is not followed by anyone.
Some slight design modifications. Refs #630.
Merge pull request #740 from capooti/issue-630

Take care of issue 630
Removed checkboxes in content table on profile page, for now. Refs #625.
Added a message in profile page in place of the table of contents if no contents has been added for the profile user.
Merge pull request #741 from capooti/issue-625

Remove checkboxes from profile page content table, and add a replacing text if profile user did not add any content
Merge branch 'master' of github.com:GeoNode/geonode into dev