Timestamp based queries in the mysql wrapper can now take advantage of MySQL partition pruning
Experience sampling probe data is now anonymized
(cherry picked from commit df7b4e0)
Experience sampling probe data is now anonymized
(cherry picked from commit df7b4e0)
EpidemicProbe data ca now populate. There is also an endpoint for retrieval
Changed version and changelog
Merge branch 'release-0.2.7'

Conflicts:
	CHANGELOG
	VERSION
Merge branch 'master' into production_sensibledtu1k