Demo Content Update

I'm going to keep it fairly brief today.

I've been absolutely slugging away at this next iteration of the demo, and I've finally got a fair bit to show for it:

- Added Friendly AI to help you in combat
- Added a new weapon, the Arc Rifle - high damage, short range, electric bolt
- Added a proper ending to the demo which transitions into the second level, after an epic fall-through-space sequence
I highly suggest playing through on Mouse and Keyboard.

I really hope you enjoy this one! More goodness coming soon enough!