IntelliJ Idea Inspections: assertionMethods

New registered assertion-method: Using JUnit's
errorCollector.
JavaDoc additions.
Add CheckReturnValue to one method.
Provide access to Selenium Server delegate.
Documentation update.
Handle/Ignore Failure on Browser Quit

Depending on the type of the exception either
log failures on quit as warning or just for
debugging purpose.
Documentation update and toString()
Add @CheckReturnValue
Documentation update.
Add Test for RemoteWebDriverProvider.