Refactor: Distinguish between member and patron

... at the client level, at least. A member is someone
who has a profile page and can receive contributions.
A patron is someone who has made or is making a contribution.
Refresh session user when data changes in db

When patron or member data changes in the database,
make sure that the req.user data is also updated.
Fix: Contribute: undefined ref

... broke things when refactoring the
stripeApiKey stuff.