CSS 3 Selectors Test

### CSS 3 Selectors tests

Original CSS work by Daniel Glazman (c) Disruptive Innovations 2008

Testing code written by Diego Perini. It should help improve the consistency with `querySelectorAll` results and match browsers internal CSS selectors behavior. Selection method calls are wrapped in a try/catch block for all libs to avoid possible errors preventing the tests to complete. Moving the mouse over the red/lime blocks will show the tooltips with info on the tests.