Refs #3261 - DRY profile variables, adds dosomething_campaign_get_campaigns_doing
Refs #3261 - Filter SMS Games from Doing campaigns
Refs #3261 - Output no signups variables if not empty
Removes address vars per #3261
Changes per #3268 review
Fixes PHP Notice for undefined variable
Merge pull request #3268 from aaronschachter/profile_vars

User Profile: I'm Doing