added README.rst
added README.rst

bioinformed/pysam,dannon/pysam,mattions/pysam,brendanofallon/pysam,carolinux/pysam,dannon/pysam,nlhepler/pysam,carolinux/pysam,TyberiusPrime/pysam,mattions/pysam,daler/pysam,kyleabeauchamp/pysam,daler/pysam,pysam-developers/pysam,carolinux/pysam,dannon/pysam,pysam-developers/pysam,TyberiusPrime/pysam,brendanofallon/pysam,dannon/pysam,nlhepler/pysam,brendanofallon/pysam,mattions/pysam,TyberiusPrime/pysam,daler/pysam,bioinformed/pysam,daler/pysam,TyberiusPrime/pysam,nlhepler/pysam,bioinformed/pysam,carolinux/pysam,kyleabeauchamp/pysam,brendanofallon/pysam,mattions/pysam,nlhepler/pysam,bioinformed/pysam,bioinformed/pysam,nlhepler/pysam,dannon/pysam,carolinux/pysam,daler/pysam,brendanofallon/pysam,pysam-developers/pysam,mattions/pysam,kyleabeauchamp/pysam,pysam-developers/pysam,kyleabeauchamp/pysam,kyleabeauchamp/pysam,TyberiusPrime/pysam