upgrading newrelic
Merge pull request #121 from edx/e0d/upgrade_nr

upgrading newrelic
fix .travis.yml to avoid hanging on shell prompt
Use group_id if present when getting user thread and comment counts.

TNL-543
Merge pull request #122 from edx/christina/bug-tnl-543

Use group_id if present when getting user thread and comment counts.
Use mongo 2.6.4 in travis builds

TNL-604
Merge pull request #123 from edx/dan-f/upgrade-travis-mongo

Dan f/upgrade travis mongo
add running & testing instrux to README