ccData: add convenience write methods for various formats
ccData: add convenience write methods for various formats

ghutchis/cclib,Schamnad/cclib,ghutchis/cclib,berquist/cclib,langner/cclib,cclib/cclib,berquist/cclib,berquist/cclib,gaursagar/cclib,langner/cclib,cclib/cclib,gaursagar/cclib,ATenderholt/cclib,ATenderholt/cclib,cclib/cclib,langner/cclib,Schamnad/cclib