Merge pull request #37 from nezticle/configuration-dev

Configuration dev
Update Readme with dependancy hint
Fix build error caused by cmake finding ncurses
Fix: host-libnih requires host-dbus
Fixed error with config options not being set
update kernel/firmware/userland

Also as a bonus, these come directly from github now,
So they are easy to change/update yoursevles.
Add host-ruby as a qtwebkit build dependency
Added configurable version numbers for VideoCore and bootloader packages to make it easier to track the latest changes