issue #120

Scripts and SQL requests have been updated to to count only "not hidden"
runs and analyzes in project view.

The custom messages indicating the expiration date for exisiting files
has been updated.

If at least one analyse or run file is found, the retention limit is
display above the list.

RunAssembly.tpl has been updated to display a custom message when the
analysis data have been purged.

old runs are still ok

useful data, update visualisation 

demultiplexStats