Add liquid_renewable property.
Allow transparent image_buttons
Move falling to builtin
Remove a useless comment
Add falling_node to special groups in lua-api.txt
Add functions to the default mod of minimal game to support old code
Merge pull request #270 from PilzAdam/master

Move falling to builtin
Replace pow() with multiplikation to improve speed
Merge pull request #272 from PilzAdam/pow

Replace pow() with multiplikation to improve speed
Fix flowing liquid animation direction calculation
Don't leak textures all over the place
Fix a bug in falling code where entities get stuck
Make air and ignore drop nothing
Merge pull request #273 from PilzAdam/air

Make air and ignore drop nothing
Merge pull request #243 from xyzz/liquid_renewable

Add liquid_renewable property, allow non-renewable liquids.
Merge pull request #274 from PilzAdam/falling

Fix a bug in falling code where entities get stuck
Formspec: Draw images before inventories. Allows to use image as background.
Merge pull request #279 from RealBadAngel/patch-2

Formspec: Draw images before inventories. Allows to use image as backgro...
Adding background to Formspec
Fix unnecessary network protocol incompatibility in ContentFeatures