Fix private method time slot model

Install stripe gem
Add charges controller

Add stripe config file

Create views

Update stripe keys to test keys

Remove stripe.js
Make Charger services controller, WIP
No errors on Charger service

WIP Stripe checkout working, needs integration with charger
Update time_slot_creator so it creates time slots with price
Add data-attribute for price on collection check boxes
Live total price based on selections, pop-up checkout upon submit