Add some custom New Relic metrics
Hits/lookup for the ETag cache and the S3 cache
Add S3 cache latency metrics
Instrument survey stats code
Use findOne to differentiate cache validation queries from actual data queries
Merge branch 'master' into instrumentation

Conflicts:
	lib/survey-stats.js
Beef up sample.env
Remove some stray logs
Merge pull request #48 from LocalData/instrumentation

Add custom instrumentation