adds context manager functions to FastaFile
adds context manager functions to FastaFile

TyberiusPrime/pysam,dannon/pysam,dannon/pysam,TyberiusPrime/pysam,kyleabeauchamp/pysam,daler/pysam,mattions/pysam,daler/pysam,pysam-developers/pysam,daler/pysam,bioinformed/pysam,daler/pysam,mattions/pysam,bioinformed/pysam,pysam-developers/pysam,dannon/pysam,mattions/pysam,kyleabeauchamp/pysam,mattions/pysam,TyberiusPrime/pysam,daler/pysam,dannon/pysam,TyberiusPrime/pysam,TyberiusPrime/pysam,kyleabeauchamp/pysam,bioinformed/pysam,bioinformed/pysam,kyleabeauchamp/pysam,bioinformed/pysam,kyleabeauchamp/pysam,pysam-developers/pysam,pysam-developers/pysam,dannon/pysam,mattions/pysam