added openable blocks (fence gates, trapdoors)
open/close blocks with right-click

added warning if trying to open an non openable block

added trapdoor to openable blocks

removed auto-header, added javadocs

fence gates should open themselves off from the player

removed header
added all types of fence gates
formatting changes
added directional placing for BlockFenceGates
added directional placing for TrapDoors; can be placed now in the above or below half of the block
added protected methods onOpened/onClosed to BlockOpenable; change fence gate direction only if opened
formatting
set algorithm for open direction of FenceGate to the vanilla one
Merge pull request #14 from Tonodus/OpenableBlocks

Openable blocks