0.3.3

• Allow to use multiple reporters in test command.
• Throw error when creating multiple suites of the same name within
  the same parent.
• Throw error when creating multiple states of the same name within
  the suite.
• Throw error when creating suite that will be unable to run (
  has states and hasn't url or capture region);
• Check argument types of SuiteBuilder methods.
• Check argument types of all actions methods.
• Shorter stacktraces for invalid elements errors.
• Correctly handle offsets in mouseMove actions.
• Fix error when gridUrl was required even if there is only
  phantomjs browser.