(#16429) Fix relative URLs of icons in tables.css

These links work when puppet-dashboard is at the top level because browsers treat /../ as equivalent to /.
(#16429) fix relative links in application.scss

With corresponding generated changes in application.css
(#16429) use a controller reference for the delayed jobs link

This gets the path right even when the app is hosted at a sub-URI.
A basic test of the page looks for the link.
(#16429) use correct links for radiator, too
Travis for master branch.
Patch for CVE-2012-5664: options hashes should only be extracted if there are extra parameters
(#17901) Fix failing tests
Update VERSION, CHANGELOG for 1.2.17
Merge pull request #122 from djmitche/relpaths

(#16429) Relpaths
Merge pull request #157 from fhrbek/spec_fixes

(#17901) Fix failing tests
Merge pull request #156 from sodabrew/travis-master

Travis for master branch