Changed bukkit version
Fixed plot protection

Plot border no longer can be modified with pistons, beds can't be placed half on border.
Update Protection.java

Added myself to authors.
Changed plot border to double slabs
Added stairs on sides of the road
Changed bukkit version to 1.7.2-R0.3
Removed onBlockMultiplace Event Handler

Removed onBlockMultiplace Event Handler - not supported in 1.7.2 bukkit API.
Merge pull request #9 from Ivan1pl/master

Plot protection & terrain generation