Full 2-way sync with Active Campaign#247

Would be great if the sync with Active Campaign also sent over Active Campaign data/updates into Continuall.ly rather than just working one way to send data from Continual.ly into Active Campaign.

We created a new entity called Contacts. We added an ability to retrive them from Active Campaign. So currently, the integration works in 2 ways. You can find our more here https://help.continual.ly/category/452-contacts