Removed basepath (no install activation hook)

Removed useless variable definition. The plugin basepath is no longer used
because in shared fs the activation hook is never called!
Added avd warning message during activation
Removed useless files
Plugin alignment with vendors

Removed widget feature
Updated versioning
Added "Show images" options

Added an option in the advanced configuration page that enables an user to show
images.
Updated translations

Just updated the Italian translations