Find elements with an id, class or name derived By selector where possible

Originally created by SergeyA.

Expressions like `$("#myid").value("test")` are about two times slower than their Selenium analog 
`new Select(driver.findElement(By.id("test"))).selectByValue("N")`

I believe it is because all selectors are translated to By.cssSelector in NonEmptyNavigator.find without any optimizations by selector type.
