Fixed heal blocks crashing servers

Oh hey it's this block. Instead of messing with health and saturation values, it just gives a player a brief potion effect. Please see the file because there are a couple of TODOs you should note.

Fixes #56
Merge pull request #78 from wooky/master

Fixed heal blocks crashing servers. Closes #56
Fixed dodgy hang glider rendering when player is on the ground
Merge branch 'master' of github.com:OpenMods/OpenBlocks
fixes sounds on luggage
Making mess in proxies. Mostly moving common stuff out of there.
Less typing in Config
Refactor ItemOpenBlock
Derpy things