Changed the color of the spinner drop down text

This change include a new file spinner_item.xml, to handle to font of
the spinners instead of using the standard android.R.layout.
This also made the lines adding layout to the drop downs in
KursusFragment.java moot, and I removed these.
Fixed a crash, by removing Toast from TabListener

Also changed all ID's to english, as well as several hardcoded strings.
Discuss which language to use tomorrow with HC
Added dummy list in Preference, for changing language
Merge pull request #3 from Dr-Ibberdibber/Work-Branch

Work branch