Adds the EconomyManager class for handling Vault payments
Adds the unfinished PermissionManager class for granting permissions through Vault
Adds the GPLv3 license
Fixes dependencies
Adds some code for withdrawing money and granting permissions when a sign is clicked
Changes cost to a double to be compliant with Vault
Adds some new command classes
Adds support for several languages
Adds README
Updates Java and Spigot versions
Adds command info and additional permission info to plugin.yml
Implements manual sign creation request cancelling