base: Piwik snippet update

Signed-off-by: Javier Martin Montull <javier.martin.montull@cern.ch>
base: feedback handler changes

* Simplifies feedback process.

Signed-off-by: Javier Martin Montull <javier.martin.montull@cern.ch>
deposit: text changes

Signed-off-by: Javier Martin Montull <javier.martin.montull@cern.ch>