Avalanche 1.8

What's Changed

• Some very hefty internal changes!

• Multiple windows supported internally. Limitations:

  • Commodities events only operate on the main (first) window
  • Does not spawn new process, so cannot use other windows whilst one is busy

• Simple ARexx port added.

• Config options moved to separate prefs window

  • Note the options to snapshot the current window and change the default
    destination are currently not available. They can still be manually set
    through tooltypes.

• Config window by @chris-y in #35

Full Changelog: v1.7...v1.8