Refactor bug fix minor feature requests

[rafecolton]

This pull request addresses the following issues:

• https://github.com/rafecolton/docker-builder/issues/129 - update /jobs to return an array of jobs, sorted by creation date descending
• https://github.com/rafecolton/docker-builder/issues/131- /jobs/:id does not include stderr message if job fails during setup
• https://github.com/rafecolton/docker-builder/issues/126 - return the full uri for log_route so it is clickable in the browser (also return info_route, which is the route for the individual job)
• https://github.com/rafecolton/docker-builder/issues/130 - add the ability to filter (by multiple filters) /jobs by adding a query string parameter

Also:

• adding tip to the travis build matrix

/cc @matthewotto @jszwedko

[rafecolton]

Also addresses https://github.com/rafecolton/docker-builder/issues/127

/cc @meatballhat

[jszwedko]

:clap: