Commit d6af21b

##[v1.7.0](https://github.com/Polymer/polymer/tree/v1.7.0) (2016-09-28)

- Fix IE style cache performance ([commit](https://github.com/Polymer/polymer/commit/d08b694))

- no need for :root to be first in the selector ([commit](https://github.com/Polymer/polymer/commit/63433c8))

- fix tests on !chrome browsers ([commit](https://github.com/Polymer/polymer/commit/7ce981b))

- Translate `:root` to `:host > *` for element styles ([commit](https://github.com/Polymer/polymer/commit/fea64b9))

- Define checkRoot only once ([commit](https://github.com/Polymer/polymer/commit/a49b366))

- Fix normalizeRootSelector ([commit](https://github.com/Polymer/polymer/commit/c2278a0))

- Comment on using the ast walker to replace selector ([commit](https://github.com/Polymer/polymer/commit/9658665))

- update travis config ([commit](https://github.com/Polymer/polymer/commit/c00687a))

- Transform ::slotted() to ::content ([commit](https://github.com/Polymer/polymer/commit/541fdfb))

- Test on native shadow DOM also. ([commit](https://github.com/Polymer/polymer/commit/11afc1f))

- Reorder. ([commit](https://github.com/Polymer/polymer/commit/cbae058))

- Remove unused. ([commit](https://github.com/Polymer/polymer/commit/92d1d8a))

- Add fallback support/test. ([commit](https://github.com/Polymer/polymer/commit/037abdd))

- A little more dry. ([commit](https://github.com/Polymer/polymer/commit/6fd0e1f))

- Use name. ([commit](https://github.com/Polymer/polymer/commit/4aa8da2))

- Support default slot semantics. ([commit](https://github.com/Polymer/polymer/commit/d458dd3))

- Remove opt-in. Exclude content from copy. ([commit](https://github.com/Polymer/polymer/commit/41e5dc0))

- Make sure click events can always trigger tap, even on touch only devices ([commit](https://github.com/Polymer/polymer/commit/02441ca))

- Add support for slot->content transformation. Need to bikeshed opt-in attribute (currently "auto-content") ([commit](https://github.com/Polymer/polymer/commit/ebf31ca))

- Support more expressive `:root` and `html` selectors ([commit](https://github.com/Polymer/polymer/commit/2a8f21a))

- Fix typo ([commit](https://github.com/Polymer/polymer/commit/192eb56))

- test for mixins in custom-style ordering ([commit](https://github.com/Polymer/polymer/commit/37646f7))

- Do not insert semicolon when fixing var() syntax ([commit](https://github.com/Polymer/polymer/commit/0a338a7))

- Make sure mixins are applied no matter the ordering of definition ([commit](https://github.com/Polymer/polymer/commit/9daea3d))

- Update gulp-eslint to 3.x ([commit](https://github.com/Polymer/polymer/commit/8b89f02))

- Fixes #3676: retain <style in <template preserve-content/> ([commit](https://github.com/Polymer/polymer/commit/8a4c00c))

- [ci skip] Update Changelog for v1.6.1 ([commit](https://github.com/Polymer/polymer/commit/ec04461))

- Apply to _marshalArgs. ([commit](https://github.com/Polymer/polymer/commit/b2cd932))

- Rename Path.head() to Path.root(). ([commit](https://github.com/Polymer/polymer/commit/77808d9))

- Use head in templatizer ([commit](https://github.com/Polymer/polymer/commit/478978d))

- Modify _annotationPathEffect ([commit](https://github.com/Polymer/polymer/commit/852aba0))

- Use isDescendant ([commit](https://github.com/Polymer/polymer/commit/b9944fe))

- Use isDeep ([commit](https://github.com/Polymer/polymer/commit/5627a55))

- Replace _fixPath. ([commit](https://github.com/Polymer/polymer/commit/6d1dd88))

- Replace _modelForPath. ([commit](https://github.com/Polymer/polymer/commit/b02eda0))

- Replace _patchMatchesEffect. ([commit](https://github.com/Polymer/polymer/commit/6ad9295))

- Add path library. ([commit](https://github.com/Polymer/polymer/commit/0320763))

- Revert "Fix _patchMatchesEffect. (#3631)" ([commit](https://github.com/Polymer/polymer/commit/a64f227))