[-] MO: ganalytics: missing transaction id

for actions purchase and refund, id is mandatory. 
order id being sent instead of if for purchase action in addtransaction
missing change in wrapOrder
id change missing
wrong parameters
wrong order id

incosistency on what is sent to analytics, what is stored in database and what is sent on refund transactions.
Merge branch 'patch-6' of https://github.com/kermes/ganalytics into kermes-patch-6
Merge branch 'kermes-patch-6' into dev (PR #13)