Fixes trentorise/dati.trentino.it#75
Added "Legal notes" and "Privacy" pages (closes trentorise/dati.trentino.it#76)
Added link to "apps" page (Fixes trentorise/dati.trentino.it#19)
Changed label "groups" to "categories" (fixes trentorise/dati.trentino.it#82)
More templates change for rename "group" -> "category"
Added base stuff for translations
Added base files for translations
Added instructions for translations
Twitter search link only targets #opendatatrentino -> need to update widget too
Added link to legal notes + privacy in user registration form (fixes trentorise/dati.trentino.it#104)
Updated legal notes (fixes trentorise/dati.trentino.it#104)
New italian translations
New essages + translations