Don't install a theme if the based on one isn't already installed

Signed-off-by: Suki <suki@missallsunday.com>
Use the version tag the way it's supposed to be

Signed-off-by: Suki <suki@missallsunday.com>
Do a redirect and set a nice updated message.

Signed-off-by: Suki <suki@missallsunday.com>
We actually need an url here :P

Signed-off-by: Suki <suki@missallsunday.com>