Improve logging

Re-opening to merge into master instead of dev. Assigning to @cap10morgan 

[CSV error surfacing card](https://www.pivotaltracker.com/story/show/74622616)
[XML error surfacing card](https://www.pivotaltracker.com/story/show/74808284)
[Stack trace logging card](https://www.pivotaltracker.com/story/show/74807122)
[New Relic and Papertrail card](https://www.pivotaltracker.com/story/show/74807594)