0.0.1: remove polymer-cli dependency, run tests with mocha (#13)

* s/wigc/wicg, udpate readme with example, use npm packages.

* update local development section

* test with mocha

* try with previous credentials

* update readme

* remove safari 9

* include Set polyfill, add safari 9 and ie11

* no es2015 in tests

* no es2015 for Fixture either

* no use of Promise

* max 2 min for tests

* remove ie11

* [skip ci] mention usage of Set

* [skip ci] image in new paragraph

* [skip ci] format title

* [skip ci] explain why $blockingElements