Added GPS check

The app now checks to see if the GPS is enabled. If GPS isn't enabled it
asks the user whether he want's to turn it on or not. If the user
answers that he wants to turn his GPS on, he will be redirected to the
settings to do so.
Added a simple UsefulInformation class
Forgot to add getters, setters and constructor...
Created a simple row layout for information objects
Created a simple adapter for the UsefulInformation class
Created another simple list fragment - InformationFragment

A fragment for displaying UsefulInformation objects.