fix link if system json lib exists
Raise clouds to 300
Params unfinished
Merge remote-tracking branch 'upstream/master' into json
Update jsoncpp
Merge remote-tracking branch 'upstream/master' into json
Merge remote-tracking branch 'upstream/master' into json
Merge remote-tracking branch 'upstream/master' into clouds
small fix
fix
Fix collision bug and disabled some collision tests
floatlands light fix
Weather stuff
Huge cave adjust, cave trees
Like wingsuit - better air control when falling
Liquid level-configurable, fix small visual liquid glitches, forced melt from flowing liquid
Removing dirt with snow, added weather effects to dirt abm
Merge remote-tracking branch 'upstream/master' into weather

Conflicts:
	src/content_abm.cpp
Merge remote-tracking branch 'upstream/master' into liquid63

Conflicts:
	src/content_abm.cpp
	src/content_mapblock.cpp
	src/map.cpp
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