Added a bottom-aligned version of this speedometer

Adds a bottom-aligned version of this speedometer for those who prefer a more classical version of the speedometer. None of the elements of the original speedometer have been modified and default settings are left untouched so that integrating the new speedometer creates no immediate differences.

The function DrawShadowedText() has been renamed DrawShadowedText3() to account for a Vector2 version of the same function named DrawShadowedText2()