* Fixed issue [#396](https://github.com/jakubpawlowicz/clean-css/issues/396) - better input source maps tracking.
* Fixed issue [#480](https://github.com/jakubpawlowicz/clean-css/issues/480) - extracting uppercase property names.
-[3.1.6 / 2015-xx-xx](https://github.com/jakubpawlowicz/clean-css/compare/v3.1.5...3.1)
+[3.1.6 / 2015-03-12](https://github.com/jakubpawlowicz/clean-css/compare/v3.1.5...v3.1.6)
==================
* Fixes issue [#489](https://github.com/jakubpawlowicz/clean-css/issues/489) - `AlphaImageLoader` IE filter.