Merge pull request #736 from JuliBakagianni/master

add BME-TMIT and FFZG nodes
Fixed url for Library of Norway.
Merge pull request #738 from dmavroeidis/fix_url

Fixed url for Library of Norway.
add a link explaining the difference between Managing Nodes and others
Merge pull request #739 from cspurk/master

add a link explaining the difference between Managing Nodes and others
add University of Belgrade META-SHARE node to the portal page
Merge pull request #740 from cspurk/master

Add University of Belgrade META-SHARE node to the portal page
add University of Vigo META-SHARE node to the portal page
Merge pull request #741 from cspurk/master

add University of Vigo META-SHARE node to the portal page
add the University of the Basque Country to the portal page
Merge pull request #742 from cspurk/master

Added the University of the Basque Country to the portal page