1.7.6

Updates API version to 1.7.6

Readds AbstractEconomy in VaultAPI2

1.7.4

Removes Permissions and Chat builtin connectors.
Whenever a legacy (net.milkbowl.vault.economy.Economy) economy is provided, Vault2 will provide an IdentityEconomy for it.
Whenever a legacy economy is unregistered, Vault2 will unregister its IdentityEconomy provider.