Fixed the GUI

GUI now outputs the pressure correctly, currently working on the
spawning system. Please grab the latest asset repo from the dropbox as
the testmap file has changed.
Fixed the spawn directions

Now made it so that the player spawns facing the centre of the map using
the new rotation feature added to the map. Also press L to bring up the
debug menu, currently only used to spit out the most recent spawn point
in the most awful way possible in code.
Merge pull request #10 from Wedgebear/master

Fixed the GUI