Merge branch 'master' into jgrpp

Remove the viewport sign cache as this is now superseded by the kd tree
implementation

# Conflicts:
#	src/crashlog.cpp
#	src/lang/english.txt
#	src/misc.cpp
#	src/pathfinder/follow_track.hpp
#	src/pbs.cpp
#	src/rail_cmd.cpp
#	src/saveload/vehicle_sl.cpp
#	src/settings.cpp
#	src/settings_gui.cpp
#	src/ship_cmd.cpp
#	src/station.cpp
#	src/station_base.h
#	src/station_cmd.cpp
#	src/table/settings.ini
#	src/thread/thread_morphos.cpp
#	src/town_cmd.cpp
#	src/train_cmd.cpp
#	src/viewport.cpp
#	src/waypoint.cpp

src/rev.cpp.in

@@ -89,10 +89,3 @@ const byte _openttd_revision_tagged = !!ISTAG!!;
  * version, thus making comparisons on specific revisions easy.
  */
 const uint32 _openttd_newgrf_version = 1 << 28 | 10 << 24 | 0 << 20 | !!ISSTABLETAG!! << 19 | 28004;
-
-#ifdef __MORPHOS__
-/**
- * Variable used by MorphOS to show the version.
- */
-extern const char morphos_versions_tag[] = "$VER: OpenTTD !!VERSION!! (!!DATE!!) OpenTTD Team [MorphOS, PowerPC]";
-#endif