adding NPM dependency badge to readme

Uses the david-dm.org service.
add CodeClimate badge to readme

related to issue #440
Update Google Analytics tracking code to Universal Analytics.
Migrate event tracking to use analytics.js
Change @streetmixapp to @streetmix twitter handle on scripts.js
Merge pull request #448 from codeforamerica/twitter

Change @streetmixapp to @streetmix twitter handle on scripts.js
Merge pull request #442 from codeforamerica/merge-in-backend

Merge in backend
add New Relic monitoring on back-end #452
Merge pull request #453 from codeforamerica/add-newrelic

add New Relic monitoring on back-end
fix for: Twitter auth flow error #455
connect Travis to Sauce Labs to run at least one end-to-end smoke test #444

add Sauce Labs credentials (billing@codeforamerica.com) and start Sauce Connect (proxy)
[fix #459] Parse MongoDB connection string properly.
Merge branch 'master' into add-first-integration-test
a simple smoke test using Protractor and Chromedriver #444
Travis: install grunt to be globally available #444
fix for commit 97dc48f
Merge pull request #460 from codeforamerica/add-first-integration-test

Add first integration test
adding Travis build status badge to readme

related to #444
Merge branch 'master' into split-client-side-js

Conflicts:
	app.js
	public/js/scripts.js