__Changelog__
- BasicSpider is no longer required to be instantiated with a `url` param, but if given, it will navigate to it as soon as the browser launches.
- Added a method to get an element's `y`
- Added a method to get an element's text (such as inputs)
- Added a method to clear an element from a textual value
- Added a send_enter method
- Added a check to see if geckodriver.exe is present in project directory on launch.