Removed storing mineral values. /mining clear removed as a result.
Added flat pay out option in config.yml. WorldGuard regions are still being taken into account, so you can customize the payment further.
Made MiningCash soft-depend on Vault. This should fix the issues some people are getting when their economy plugin registers itself after Vault is enabled (the plugin I use, Fe, registers with Vault and didn't exhibit that issue).
I have made more of an attempt to test more economy systems this time by testing with EssentialsEconomy, but something else may go wrong. You will never know.
