v0.1.5  --  2017.03.17
* Update dependencies
* Improve documentation

v0.1.4  --  2016.06.03
* Update dependencies

v0.1.3  --  2015.11.18
* Relax validation of native implementation (do not require proper stringification of Map.prototype)

v0.1.2  --  2015.10.15
* Improve native detection
* Ensure proper inheritance
* Update up to specification
* Fix spelling of LICENSE
* Update dependencies

v0.1.1  --  2014.10.07
* Fix isImplemented so native Maps are detected properly
* Configure lint scripts

v0.1.0  --  2014.04.29
* Assure strictly npm hosted dependencies
* Update to use latest versions of dependencies

v0.0.1  --  2014.04.25
* Provide @@toStringTag symbol, and use other ES 6 symbols
* Fix iterators handling
* Fix isImplemented so it doesn't crash
* Update up to changes in dependencies

v0.0.0  --  2013.11.10
- Initial (dev) version
