CS-4563: User editing in back-end allows for cross-site scripting

Cast user id parameter to int.
Cast language id parameter to int and fixes error on not found language.
Merge remote-tracking branch 'holman/fix-user-edit-injection' into v4.1
updated language resources
updated language resources
Added scripts for converting PHP localizations to GNU gettext format (and back)
updated language resources
updated language resources
Update newscoop/template_engine/classes/CampTemplate.php

fix for fucking "filemtime(): stat failed for blalbla".
Problem exists when filemtime don't have rights to write in cache" Common problem best solution on stackoverflow.
updated language resources
small cleaning
add traceable event_dispatcher in development, fix profiler, add custom parameters support
cleaning
fix common problems and fix smarty support in plugins
CS-4579: done
updated language resources
Corrected path for running script from git directory
Remove trailing whitespace
enable forms in symfony
add support for widgets in plugins, add UpdatePlugin command
Added British localization