Some adjustments

Signed-off-by: Suki <suki@missallsunday.com>
A brand new sources file for helper functions and stuff

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

Signed-off-by: Suki <suki@missallsunday.com>
Use the newly created function.

Signed-off-by: Suki <suki@missallsunday.com>
Call the right function.

Signed-off-by: Suki <suki@missallsunday.com>
Change the text strings to suit the themes page

Signed-off-by: Suki <suki@missallsunday.com>
Add some code to handle possible errors during install.

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