Added about screen

Clicking on the settings icon takes you directly to the About screen. I
also changed the app drawer icons to CyanogenMod 10's app drawer icons.
I'll change it later on. There's still a lot of work to be done. Also in
the settings menu, I will not include "Android Version 4.4.2" instead
I'll input "CyanogenMod PSP -C (unofficial)" Also including the build
number.