add “project home” link to gitweb pages, to link back to the forge

this makes navigating easier if you don’t frame gitweb
taken from Evolvis
Added dependency on php-cas
Merged from 5.2
Fixed some packaging metadata
Removed +x bit on files where it didn't make sense
Removed +x bit on files where it didn't make sense
Removed +x bit on files where it didn't make sense
Merged from 5.2