Lua Tidying

[warmCabin]

I wanted to fix some Lua issues I've dealt with over the years. I kept working off of #802 because I am lazy. Just ignore any palette-related stuff for now, I'll rebase eventually.

• Lua command line args weren't always getting passed. I made sure to read them in the following circumstances (Win32 only; SDL/Qt still needs to be investigated):
  • Recents menu
  • Main window dropfiles event
  • Shift+L thing
  • Main window context menu
  • Loaded from command line; to that end, I've created a new -luaargs argument.
• Tidy up the Win32 Lua console window
  • Fix some awkward resizing behavior
  • Clean up the reentrant WM_CLOSE/IDCANCEL flow
  • Make it so IDOK (pressing enter) runs the script instead of closing the window
  • Make a button to clear console instead of a menu item
• Properly tokenize arguments according to the Lua spec
  • This includes a compatibility mode toggle just in case anyone else on the planet actually uses these
  • I didn't implement any checkboxes in the SDL/Qt drivers, so compatibility mode is on by default for them
• Replace "\n" with "\r\n" when printing to Win32 console window
• Separate print() arguments with tabs, not spaces (all frontends)

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I provided stubs in the Qt drivers, so the SDL/Qt builds at least still work.

[warmCabin]

FREE AT LAST! Everything's working again. The Qt build keeps timing out for whatever reason, but when it doesn't, it works. The Mac build is back to failing with that "/bin/sh: -c: line 0: syntax error near unexpected token `>'" error.

[warmCabin]

I gave up trying to fix the Mac builds. I have a couple more Lua ideas I want to explore, but I'm going to call it here for now.