1.0.31 - and a few more 2.3 fixes

Smaller things this time around:

• Switched back to having all GMLive internal variables prefixed to avoid this bug (which I thought was fixed)
• Fixed "delta_time" not working in live code (this is also caused by a GM bug)
• "live_enabled" now works for stripping out most of GMLive code entirely in 2.3
  Note that you can get "Error on load - could not find script" if you reference undocumented parts of GMLive in your code without checking for live_enabled prior.

If you are wondering why the extension is skipping versions, that's because Marketplace uploads fail validation and I have to re-upload them to website manually.