add limit for steps to avoid runaway memory consumption by collision handling
Merge pull request #431 from sapier/dtime_clamping

add limit for (collision handling) steps to avoid runaway memory consumption
Add sound volume controls to ingame menu
Read server_announce from minetest.conf for GUI
Merge pull request #503 from RealBadAngel/master

Add sound volume controls to ingame menu
Add seed parameter for default and L-system trees
Merge pull request #505 from RealBadAngel/master

Add seed parameter for default and L-system trees
Update README
Change Minetest-c55 to Minetest
Update buildbot
Merge remote-tracking branch 'upstream/master'