upgrade facade to 0.2.6
add ecommerce to google-analytics
add curebit ecommerce support
add user traits to curebit
bronto: add ecommerce
gosquared: add ecommerce
kissmetrics: add ecommerce
foxmetrics: add ecommerce
update google-analytics
kissmetrics: add order id
gosquared: send category
Merge pull request #52 from segmentio/add/ecommerce

Add/ecommerce