Bugs Fixed, Importing Stabilized, Full Multi-Proxy Support

• The feature of importing from other plugins has been tested and stabilized.
  • Thanks to @KoxSosen , VanironCZ, and @4drian3d for contributing test data.
  • Various importing-related bugs have been fixed.
  • All fixes are visible in #38
• Full multi-instance support, including multi-proxy support, has come to LibertyBans
  • Multi-proxy users can configure the exact details of the mute cache. 85a04e7
  • From this version onward, multiple versions of LibertyBans can stably co-exist with the same database. Previously, if you installed 2 versions of LibertyBans, started the new one, and then started the old one, the old one would refuse to use the database. 59dc656
• Removed log spam ("0 rows affected") by upgrading flyway. 27082f8
• More tests.
• Cleared all hurdles to building and compiling LibertyBans from source. You can now rest assured that you can easily compile the latest sources of LibertyBans, making any changes you desire, and having those changes be immediately reflected in the jar once you rebuild it. 8f572f2
• Velocity users who experienced issues with tab completion: if you have some time to debug, you can help solve the issue sooner. There is now a debug message which is logged every time a command is executed. To see this message, you'll need to configure Log4j which is used by Velocity. Contact me if you need help on how to do this - it's a valuable thing to know in general. 712ceff