Added capability to choose specific type of locator to improve performance

Signed-off-by: Daniel Koo <danieljamin.koo@gmail.com>
Removed 3 second sleep in getNewSessionDo as Selenium 2.41+ fixed the existing issue

Signed-off-by: Daniel Koo <danieljamin.koo@gmail.com>
Modified to add performance improvements by storing WebDriver WebElement and By locators

Signed-off-by: Daniel Koo <danieljamin.koo@gmail.com>
removed cached WebElement, moved type caching to constructor, added By for trial and error
Merge pull request #1 from mike-glorioso/kood

by trial and error + discussed changes
Merge pull request #69 from kood1/master

Performance improvements on Element.findElement()