- send sku alongside name to paypal - send line items on purchase step (last step) to paypal, so it shows up in the paypal backend and in emails

Fixes #36
Fixes #43
Added ecommerce flash

Fixes #41
Add utm_nooverride as per this spree user thread:

https://groups.google.com/forum/#!topic/spree-user/uScFGdiX_DE
Removed tax total