Merge pull request #1 from IL2648/zen

fixed division, subtraction, and decimals
Added browser tab icon, start of stats/help

- Added an icon for the application to appear in the browser tab
- Added places for help information and statistics to go
Updated the help page to be functional. Help items expand and limit
themselves to having only one open at a time.
my branch is broken

look at the commit details in my branch, for some reason it broke and i
cant even pull from it now.
Merge remote-tracking branch 'origin/drn' into zen