Initial commit of the new method "prayer"

The new method is a "clean-room" implementation of the prayer times
and qibla direction calculations. This new implementation uses
simpler but approximate methods. This should make the code much
simpler and easier to maintain. The impact on accuracy is still
to be determined. Please NOTE that this is still WIP and far from
being complete
They do not cite where this number comes from. I found 18 degrees to make times that more closely match with http://www.ummulqura.org.sa/