Release the Player object reference on quit.

Merge branch '2.x' of github.com:essentials/Essentials into 2.x

Fix null teleport costs.

Throw meaningful warnings when wrong Essentials version is used with …

…unsupported mod packs.

Update ItemStack reference to getTypeId()

CB 2788 - 1.5.2

CB 1.4.7

CB 2543 - 1.4.5

CB 1.3.2 R1

Fix mail