Added wrapper to Flow{Reader,Writer}
Added wrapper to Flow{Reader,Writer}

Added context support. See test_flow.py

simleo/pydoop,elzaggo/pydoop,crs4/pydoop,crs4/pydoop,simleo/pydoop,elzaggo/pydoop,simleo/pydoop,elzaggo/pydoop,crs4/pydoop,crs4/pydoop,simleo/pydoop,simleo/pydoop,elzaggo/pydoop,elzaggo/pydoop,crs4/pydoop