register user properties with mixpanel upon login.

note these won't change after the user changes them, unless
the user refreshes teh page. needs fixin.
login current user from flask-injected object.
register just email.
register select w mixpanel.
bugfix, include mixpanel.register() line.
compile.
don't return stripe or "collection_id" in linked accounts.
count products when sending "viewed own profile" event.
send mixpanel.track config object along with event name.
track num true products on a profile view.
change name of products count.
compile
mixpanel event for delete product.
number of products instead of products count.
delete event sends no object.
product page no longer refreshes on edits.
mixpanel track for delete product.
Merge branch 'master' of github.com:total-impact/total-impact-webapp