change README.rst to README.md in setup.py
change README.rst to README.md in setup.py

jck/pymtl,12yujim/pymtl,cornell-brg/pymtl,jjffryan/pymtl,12yujim/pymtl,Glyfina-Fernando/pymtl,tj93/pymtl,cfelton/pymtl,jjffryan/pymtl,Glyfina-Fernando/pymtl,cornell-brg/pymtl,tj93/pymtl,tj93/pymtl,Glyfina-Fernando/pymtl,cfelton/pymtl,12yujim/pymtl,cornell-brg/pymtl,jjffryan/pymtl,jck/pymtl,cfelton/pymtl,jck/pymtl