Simplifying test suite bootstrap by using "autoload-dev" for tests
Changing way for Mink 2.0 version detection

1. take care of NodeElement calling `getDriver` from constructor (in Mink)
Merge pull request #45 from aik099/45-update-mink-version-detecting-code

Update Mink version detecting code
[WIP] Allow element location with explicit timeout

1. Need to write code, that uses NodeElement::waitFor method
Adding tests to cover `WaitingElementLocator`