Implementation of history endpoint
Deals with issue #17 (closed) which is essentially similar to cms-tracker-phase2-onlinesw/herd-app#22 (closed) and implements the history endpoint in pyswatch in chronological order.
Deals with issue #17 (closed) which is essentially similar to cms-tracker-phase2-onlinesw/herd-app#22 (closed) and implements the history endpoint in pyswatch in chronological order.