adding a tgrc logo for the homepage, making the link more prominent as requested by NSF.
adding a tgrc logo for the homepage, making the link more prominent as requested by NSF.

solgenomics/sgn,solgenomics/sgn,solgenomics/sgn,solgenomics/sgn,solgenomics/sgn,solgenomics/sgn,solgenomics/sgn