Merge branch 'admin-reports' into number-of-products
Add timestamps to SQLProduct
Move product timestamps from couch to sql
Add number of product graph
Merge branch 'master' into number-of-products

Conflicts:
	corehq/apps/hqadmin/reporting/reports.py
	corehq/apps/hqadmin/reports.py
Merge pull request #4479 from dimagi/number-of-products

Number of products