ARQGRA-234: JQuery for Sizzle locators installed in no conflict way

The object jQuery is installed with jquery.noConflict(true) to the
window.Graphene.jQuery object. That is why the $ is not predefined by
this installation neither.
ARQGRA-246: ByJQuery#findElements consistent bahavior.

It is now consistent with selenium implementation of By, thus when using
ByJQuery#findElements for locating not existing elements an empty List
is returned. Exception is thrown when using ByJQuery#findElement in the
same way.
ARQGRA-234: renamed SizzleJSPageExtension to JQueryPageExtension