revise counting unique users across conversations - clinic
revise counting unique users across conversations - chw
revise counting unique users across conversations - personal
adjust tester names
Merge branch 'feature/issue-19-v1-metrics-usage' into feature/issue-27-v2-metrics-usage

Conflicts:
	go-app-clinic.js
	src/clinic.js
	test/chw.test.js
	test/clinic.test.js
	test/personal.test.js
improve enter/exit metric fire
finish incomplete stages metric - clinic
move users metrics to function
remove whitespace
remove commented out code
remove whitespace
implement metrics in chw
remove commented out code
implement metrics in personal