Gem Hunter V0.7.1 Release

I forgot to post the update for V0.7.0. I'll be creating it shortly!

Here's what is new in V0.7.1:

- A fancy little opening cinematic!

- Character selection! With permission from @HarpLeeDave, I've added his Treasure Taker characters, as well as my own OC Atom Girl from my Laser Blast! series:

- Quick drop! You can now quickly drop gem columns using the up key:

I'm thinking of wrapping the game up soon and leaving the single player mode as an extra feature after V1.0.0 is completed. I enjoy working on this game occasionally, but I want it to be a bit more polished up and released since I think a 1 player vs AI mode could be added in later.