Updated resources

Signed-off-by: Nathan Heu <nathan.heu@viacesi.fr>
Updated resources
Updated plugin.xml
Updated plugin.xml
Updated namespace to org.nitlanguage
Updated gitignore to avoid commiting temporary xml files
Updated namespace to org.nitlanguage
Updated namespace to org.nitlanguage
New cleaning campaign modification of classes comments
Hard coded views id
Added 4 window preferences pages to Nit perspective + trim whitespaces
Launcher support simplified