Release 120

This is a bugfix and modding API release.

• Added a hack to make the game run with Java 9 or above (this is not supported; may cause errors and may fail in the future)
• Ravine (Slamgrotte) can now be traversed backwards after beating it. 
• Fixed a bug where the dock rail events would create softlocked save states if executed during the final boss.
• Fixed a problem where it was possible to go out of bounds during the Corrupted Alexander battle.
• Fixed a bug where the foundry crane could move in the wrong direction if a rotation lever was hit at a very specific time after the movement lever.
• Fixed a rare warning when shutting down the audio system on exit.
• Fixed a benign memory leak when using the OpenAL audio backend. 
• A third audio backend (Competent Audio) is now available.
• Fixed an issue where Main would invoke some Swing functions on a non-EDT thread, potentially causing unknown spurious bugs.
• Added more menu button modes for game controllers where using all buttons for menu navigation led to poor results.
• Reduced the likelyhood of failure to reload jinput.
• Mitigated occasional visual glitches caused by particles around the edges of the screen.
• Fixed an issue where the map loading progress bar went above 100% and then back to 99%.(edited)
  

In addition, there are many internal changes that are relevant to modding, but do not affect the game. For more information, see the Sourceforge commit logs or the Discord server.