v0.1.4  --  2015.04.13
* Republish v0.1.2 as v0.1.4 due to breaking changes
  (v0.1.3 should have been published as next major)

v0.1.3  --  2015.04.12
* Update up to changes in specification (require new, remove clear method)
* Improve native implementation validation
* Configure lint scripts
* Rename LICENCE to LICENSE

v0.1.2  --  2014.09.01
* Use internal random and unique id generator instead of external (time-uuid based).
  Global uniqueness is not needed in scope of this module. Fixes #1

v0.1.1  --  2014.05.15
* Improve valid WeakMap detection

v0.1.0  --  2014.04.29
* Assure to depend only npm hosted dependencies
* Update to use latest versions of dependencies
* Use ES6 symbols internally

v0.0.0  --  2013.10.24
Initial (dev version)