Add initial invoice created event handler
pass stripe to invoice.created handler
Add helpers for VAT calculations
Initial approach to adding invoiceItems
Don't add VAT for first invoice
Add VAT logic to subscription creation

This has moved the functions from invoice.created handler module
into a separate utils fiel so we can share most of the logic with the
upgrade handler.
Use promises with the stripe API

Would have doen this before, didn't realise was supported!
stripe utils is dir
Use real vat-rates for EU countries
resolve with decimal representation of VAT
Update description to show percentage
Floor percentage as per @remys request
initial upgrade of stripe subscriptions file
update file mode -> 755
add hashbang and use strict
Add list of invoices to subscription page

urls currently don't work
Add basic invoice page
Capture user ip in stripe customer metadata
update invoice view
update view from earlier