FontRenderer now uses glMapBuffer/glMapBufferRange for data transfer

Fixed Font Renderer so drawString with size X and a size Xpt font base
will draw on the screen at size Xpt (basically fixed scaling issues)
Switched the Font Renderer to use glMapBuffer, no need for maintain a
buffer in ram for each Font Renderer to mirror the VBO.
Made rendering strings < 128 length more effecient
Fixed rendering strings > 128 length