Shop should be integrated into Member Portal

[bensaufley]

Multiple benefits:

• Single sign-on
• Payment management with Stripe (extended payment management another issue)
• Ability to automatically confirm user membership for members-only prices
• Further steps toward single integrated web application (and steps away from hacky WordPress plugins)

[bensaufley]

See bs_add_spree for some work in this direction. I'm unconvinced that Spree is the right solution. It's pretty unwieldy and not very well-documented, and very much intended not to integrate with an existing Devise implementation, despite what some of its documentation indicates. Plus, it seems like overkill. I'd kind of rather just figure out the spec and roll it myself/ourselves, although that's definitely got its own set of issues. It just seems like we could do it in a simple and maintainable way – it's not an overly complex problem to solve. A gem like Spree is built to be complex, robust and customizable by non-devs but we can just customize the raw environment to fit our needs.