Add fig as an alternative to Vagrant

This might help people get started that are having problems getting the
Vagrant image up and running. I'd like to see what it's like on a
variety of machines and operating systems.
Merge pull request #237 from whatupdave/fig

Add fig as an alternative to Vagrant
Added screenshot to stripe docs
Added demographics and interest support to GA
dev env changes - added turnip, selenium, configs
minor refactoring

updated fabricators

invoicer rendering refactoring
features and steps
Merge pull request #240 from YaroSpace/bug_invoice_generation_#392

Bug invoice generation #392
fix for updating ES index when deleting a user and associated records