Merge branch 'master' of https://github.com/supertuxkart/stk-code
Merge branch 'soft-physics-landing' of https://github.com/supertuxkart/stk-code
Merge branch 'master' of https://github.com/supertuxkart/stk-code
Merge branch 'master' of https://github.com/supertuxkart/stk-code
Merge branch 'master' of https://github.com/supertuxkart/stk-code
Merge branch 'master' of https://github.com/supertuxkart/stk-code
Merge branch 'master' of https://github.com/supertuxkart/stk-code
Merge branch 'master' of https://github.com/supertuxkart/stk-code
Merge branch 'master' of https://github.com/supertuxkart/stk-code
Merge branch 'master' of https://github.com/supertuxkart/stk-code
Removed debug code.
Fixed sound objects.
Handle setMasterVolume in sfx thread.
Make sure the sfx are resumed before calling onSOundEnbaledBack().
only one saved GP per GP-ident

Conflicts:
	src/graphics/glwrap.cpp
fix ordering of the karts and maybe some more
Save GP reverse Type; close #1137
Save GP on abort
Remove saved GP when we start new race.

Avoid a crash. Saved GP was deleted, but was not NULL. And in other place we have if(m_saved_gp != NULL) check, which was true for deleted object.
Redrawing GP info screen is not needed now.