Release of 1.4.17

- c66a54846ddebee754c772471d1ae7eb6d3c3542: Merge pull request #924 from mattrjacobs/backport-pr-921
- 7c5003dddea138b0d3e035029fd53c627b7017ae: fix(title-xss): escaping text acquired from parameters to avoid any xss attacks
- c5eb45b31eb5fce074268b122afec84713809a72: Merge pull request #923 from mattrjacobs/rx-1-0-14
- cba647101b5c84dc6f1f327dddf41b83ed6ae719: Upgrade to RxJava 1.0.14
- d03de7d49c27a11a2267be491931746f571776c4: Merge pull request #922 from mattrjacobs/add-debug-tag-to-servo-rolling-counter
- 8a6b3bb6a3d165135fa5e08b21be8678d3f013b1: Add DEBUG tag to Servo rolling counter and made it a GaugeMetric
