CHANGE: Upgrade dr_rdpng.cc to the latest version from standard.
CHANGE: Increase the default rolling resistance of tramways and roads according to historical research
FIX: Makeobj project files were not configured correctly
FIX: Maximum speed and weight were not displayed in the tooltip for ways with prohibitive way constraints
FIX: Crash on reversing in some cases
CHANGE: Further increase of default rolling resistance for trams (4x that of rail)
FIX: Errors in calculating routes with long-block signals and, in some cases, choose signals
FIX: Crash in some cases relating to tram elevated ways
FIX: Crashes after map expansion in some cases.
FIX: Passengers and cargo would sometimes go missing when loading
VERSION: Step to release build
VERSION: Increment to next minor version (11.16)
Merge branch '11.x' into 12.x

Conflicts:
	simversion.h
Merge branch '12.x' into devel-new

Conflicts:
	vehicle/simvehikel.cc
CODE: Add themes.tab to repository (from Standard)
NOTE: Does not compile yet.

Merge branch '112.5-merge' of git://github.com/BerndGabriel/simutrans-experimental.git into 112.5-merge

Conflicts:
	besch/vehikel_besch.h
	simhalt.cc
	simutrans/themes/themes.tab
	simwerkz.cc
FIX: Coupling constraints for vehicles with single freight images and multiple liveries did not work.
CHANGE: Make more efficient use of space in the depot/replace windows (allows more constraints to be shown at once)
FIX: Pointer misalignment in the depot/replace windows from previous commit
Merge branch '11.x' into 12.x
Merge branch '12.x' into devel-new
Merge branch 'devel-new' into 112.5-merge

Conflicts:
	gui/components/gui_convoy_assembler.cc
	gui/components/gui_komponente.h