{AH} add AlignmentFile.text back for compatibily
{AH} add AlignmentFile.text back for compatibily

kyleabeauchamp/pysam,kyleabeauchamp/pysam,pysam-developers/pysam,pysam-developers/pysam,kyleabeauchamp/pysam,kyleabeauchamp/pysam,kyleabeauchamp/pysam,pysam-developers/pysam,pysam-developers/pysam