Various improvements and bug fixes

Added 8 new songs to the Gramophone. Added Entity:tardisPilot E2
function. Updated official E2 to include !pilot command. Removed the
"temporary" rectangle behind of the exterior front door and actually
modified the mesh slightly to fix it permanently, this should make
teleporting look a bit better. Changed DematHADS to DematFast to be more
general, as the demat circuit now uses it and no longer requires
longflight to be on. Exterior colour change on explosion is not quite as
dramatic anymore. Physlock will no longer function in vortex, preventing
falling through the map (sorry if you liked to fly around with no
collision, maybe something similar will return some day).