Merge pull request #34 from ted27/master

Improve some minor things
Move sqlite3 gem to development group

It can't install on Heroku, so putting it in the development group
should prevent it from trying.
Color zipcodes based on largest donor
Displaying a circle at the center of each zipcode
Laying city boundaries over zipcode boundaries. Bubbles reflect size of donation in a given zipcode.
Pull and rebase to sync with shared repository.
Fix Bryan Parker's name
Added a legend with clickable buttons. They know they've been clicked but nothing happens yet.
Bubbles update when candidate labels are clicked
Updated bubble colors
Color zipcodes based on largest donor
Displaying a circle at the center of each zipcode
Laying city boundaries over zipcode boundaries. Bubbles reflect size of donation in a given zipcode.
Pull and rebase to sync with shared repository.
Added a legend with clickable buttons. They know they've been clicked but nothing happens yet.
Bubbles update when candidate labels are clicked
Updated bubble colors
Merged to remote repository
Reduced bubble size
Removed parameters from ActiveRecord so the app will run on Heroku