#20121 Added link to the how to video in navigation menu

git-svn-id: https://svn.eionet.europa.eu/repositories/Naaya/trunk/eggs@20976 a0171fae-0946-0410-966d-b1775066cd26
released 1.4.23, new version 1.4.24

git-svn-id: https://svn.eionet.europa.eu/repositories/Naaya/trunk/eggs@20977 a0171fae-0946-0410-966d-b1775066cd26