Add on_rightclick(pos, node, clicker) callback for nodes
Repeated right clicking when holding the right mouse button
Configure using repeat_rightclick_time in minetest.conf
Switch to fly mode if spacebar is doubleclicked
Can be turned off in the key change GUI or in minetest.conf via doubletab_space
Fixed content_abm aliases

Since commit 5a13c49492 when I'm in a new area of the world that hasn't
yet been generated the debug log gets flooded with the following error:

Map::setNode(): Not allowing to place CONTENT_IGNORE while trying to
replace "default:dirt_with_grass" at (729,1,-219) (block (45,0,-14))

This commit fixes that.
Fix typo doubletab -> doubletap
Implement textarea in formspec, a multiline input field
"or" should be "||". Don't use "or", "and", etc.. It breaks build.
L-Systems treegen update.
Fix buttons not working for Lua-triggered formspecs
Add a setting to enable always flying fast
Disable all HP handling if enable_damage is false
Fixed two typo's in commit 615fd498bc
fixes node timer bug (fixes #407).

Previously, when a block was activated, on_timer callbacks where
called with the relative position of the node inside the block,
instead of the absolute position of the node.
fix integer overflow (fixes #414)

liquid_kind was declared as an u8, but used to hold a content_t value, which is delcared to be a u16.

changing this fixes (at least for me) the problem reported in bug #414.
Fix spread of items in falling code