Formatting & appearance update, round 1

Just a few minor updates to help move development along...

1. Updated fight file to remove the embedded CSS and move it to an external stylesheet. 

2. Embedded a web font and customized the HP bar to feel more game-like.

3. When the HP bar drops below a certain percentage, it changes color to add excitement.

4. Rearranged some blocks and reformatted some text for a better user experience.

5. Added the "latest hit" block, and renamed the "latest hits" to be "battle log", which is closer to an MMO style.