#113 Change browser capability

[Maurizio Todaro]

In net.sourceforge.jwebunit.selenium.SeleniumTestingEngineImpl class
the method beginAt use embedded browser key to call selenium server
a get and set method my be usefull to provide this feature

public void beginAt(URL aInitialURL, TestContext aTestContext) throws TestingEngineResponseException {
83 this.setTestContext(aTestContext);
84 selenium = new DefaultSelenium("localhost", port, "*chrome", aInitialURL.toString());
85 selenium.start();
86 gotoPage(aInitialURL);
87 }
88