Per issue #11. First steps on heartbeat API.
Per issue #11. Copy and paste errors.
Per issue #11. Adding heartbeat classes to the main .h file.
Merge branch 'develop' into heartbeat

Conflicts:
	BNGAPI/BNGAPI/BNGAPI.h
	BNGAPI/BNGAPI/Classes/BNGAPIResponseParser.h
	BNGAPI/BNGAPI/Classes/BNGAPIResponseParser.m
Per issue #11. Merge issue.
Per issue #11. Some more tests.
Per issue #11. Adding parsing for the heartbeat API.
Per issue #11. Sorting out which URLs have been implemented and which ones have not been implemented.