Merge pull request #149 from codeforamerica/revamp-for-local-setup

Revamp for local setup
add launchy gem
Remove AppContentSet rake tasks
Set root path to location search page
Remove redundant @content assignment from LandingController
Move request spec to feature directory
Drop AppContentSets table
Load AppContentSet from config/app_content_set.csv
making AppContentSet#issue and #feedback_form_url accessible
integration testing for messages
Add instructions for local Twilio testing
add test coverage for blank phone numbers
remove redundant voice survey spec
extracting twiml generation to views
removing dead code from voice feedback controller
changing call_sources utility method to hash
refactoring twilio redirect
removing puts from VoiceFeedbackController
refactor error2 into TwilioSessionError
Add specs for FeedbackInputsController#most_feedback