Update CONTRIBUTING.md

Include the new insight template for defining new insights
Fixes Foursquare plugin by adding date parameter to API calls.
Merge pull request #1974 from AaronKalair/fix-foursquare-plugin

Fixes Foursquare plugin by adding date parameter to API calls. Closes #1789 closes #1817
Quiet down chatty log messages during Twitter crawl
[DB MIGRATION REQ'D] Store Facebook profile updated time

Get updated_time from facebook and store in tu_instances_facebook.profile_update
Adds instances_facebook table.
Adds FacebookInstanceMySQLDAO.
Adds FacebookInstance.
Adds lots of tests.
Updates crawler to store the updated_time for a given running instance.
Ignore Grunt and NPM files and config
[DB MIGRATION REQ'D] Add user gender and age fields
This commit is only the database migration which adds gender and age fields to the users table.
Laying the groundwork for future insights related to gender and age.
Fix rollback markup
Added offset to times in instgram crawler test.
ThinkUp LLC hosted app redesign

TODO:
* Redesign OSP admin views for plugins other than Facebook and Twitter
* Delete old dashboard and menu interfaces, classes, registrars, tests
* Add missing test coverage
* Clean up code
Avoid mixed content warnings when running app on SSL
Email redesign assets [ci skip]
Email redesign
Email fixes - Date, header copy, unsub link
Reintroduce privacy setting
Utils function to determine if ThinkUp LLC endpoint is set
Set from and unsub link in email notifications from thinkup.com correctly
Implement random subject lines and header text in insight notification emails
Fix randomizer range bug
Set from: address to team@thinkup.com for ThinkUp LLC