added custom.css for UI tweaks; index.html modified to account for custom.css; some explicit css assignments to table elements removed from ui.js, amendments to css should be set in custom.css
Merge pull request #1 from mtsanderson/blake_dev

Pulling in some CSS changes from Blake
Adding new javascript file to handle eventual game logic
Change index.html to remove line breaks (will css), and to add populate rack button
Pulling some code out of ui.js and into game.js ui should handle ONLY UI things
onload lettersui instead of ui
Temporarily giving divs style
Removed non UI functions out of ui.js