Feature/issue 2626 processentry notification (#2635)
Feature/issue 2626 processentry notification (#2635)

* Notes from call w/ Adam

* Notes on container/heap usage

* Fixes #2626 processEntry calls can skip notification when it unblocks pending sequences

ceejatec/sync_gateway,couchbaselabs/sync_gateway,ceejatec/sync_gateway,couchbaselabs/sync_gateway,couchbaselabs/sync_gateway,ceejatec/sync_gateway,couchbaselabs/sync_gateway,ceejatec/sync_gateway