Added alpha fade functionality to RenderingItem

-Added bool doFade and uint8_t to hold alpha value
-Moved updating of alpha value to RenderingItem
-RendeirngItem will still work as norma, but now has the possiblity to
fade alpha of its texture.
-Removed localPlayerText* and replaced it wtih a single renderingItem
-Added RendeirngItem::Reset() which resets the texture using
RenderHelpers and the supplied arguments