Add contribution documentation.
Update CONTRIBUTING.md
Force the appropriate RACK_ENV for tests
Merge pull request #96 from codeforamerica/contributing

Add contribution documentation
Merge pull request #97 from codeforamerica/fix-test-env

Force the appropriate RACK_ENV for tests
Scroll for maps with many lines.
Maintain line ordering.
Change back button to say "All lines"
Make underlines in assumptions area more obvious.
Round cost to two significant digits.
Clarify advanced outputs, link to more details.
Merge pull request #102 from codeforamerica/jankguard

Jankguard
Cycle through colors instead of choosing randomly.
Disable individual service windows if input is invalid.
Add new map button.
Fix overflow CSS.
Fix share link bug in IE.
Merge pull request #103 from codeforamerica/jankguard2

Another round of usability fixes
Add New Relic configs
Set New Relic to only run on prod