added more dependancies to the installation docs - pluginfactory, test-unit-mock, and diff
added more dependancies to the installation docs - pluginfactory, test-unit-mock, and diff

--HG--
extra : convert_revision : svn%3Ab4f3b83b-18d6-0310-a2de-c8f40de7a630/Arrow/trunk%4034

ged/arrow,ged/arrow