Alchemy cleanup, part 1.
Fix ConcurrentModificationException with alchemyBrewTask.finishImmediately()

Fixes #1848
Don't set potion meta data

It causes incompatibilities with other plugins.

Fixes #1849
Compile with 1.6.4-R2.0
Fix remaining potion data values

Fixes #1844
These go the other way around.
Don't set potion meta data - for Vanilla potions
Store Locations, not BlockStates

Fixes #1862
Schedule check after putting a new bottle in the brewing stand
Cleanup finishBrewing a bit
Skip glass bottles as well

Fixes #1859
Store McMMOPlayer objects as metadata
No need to clone here and it's not null checked

Fixes #1864
The defender isn't necessarily a player here

Besides, the defender doesn’t need to have the player data key anyways
Check durability before repairMaterial
Rename mod files to type.default.yml

Fixes #1870
Get mod config file resources properly

Fixes #1870 for real
Added new permission node to control who can check version number

Negate this permission node to hide the version number from /mcmmo and
motd
Fix potion datavalues for Splash poison II potions
Fixed exploit involving Call of The Wild. Fixes #1877