add loggers for testing
convert the value stored in redis to its original value before returning
modified redis keys for question metrics: key contains question indexes,
value contains zset of userids
clean up logger
fix bug
remove question metrics
update comments
Merge pull request #62 from kimyen/develop

Fix Bugs and Modify Correct/Incorrect Responses Metrics
modified question metric keys:
 key contains questionIndexes
 members are responseIds
add methods to get data for Question Pass/Fail Metrics
point dashboard to staging and return empty list instead of null
add method to get the data ready for Question Pass / Fail Metric
convert id to string before add it to part of the key
change the type of param to List<String> to reuse it with different
metric, especially when the ids are optional
Upgrade Vagrant Debian version. Use NFS for better Vagrant performance. Upgrade guest hardware configuration.
Upgrade package versions.
add a pause after reading a batch of files
getting the correct timestamp for each response
eliminate passing redundant data
Merge pull request #63 from kimyen/develop

Question Pass/ Fail Metrics