Added download path to openmmtools.
Added download path to openmmtools.


Former-commit-id: 523c3fffa1f4e493b0cab62c982a53909992b552
omnia-md/conda-recipes,cwehmeyer/conda-recipes,jchodera/conda-recipes,swails/conda-recipes,omnia-md/conda-recipes,peastman/conda-recipes,rmcgibbo/conda-recipes,jchodera/conda-recipes,rmcgibbo/conda-recipes,mpharrigan/conda-recipes,swails/conda-recipes,swails/conda-recipes,mpharrigan/conda-recipes,swails/conda-recipes,rmcgibbo/conda-recipes,marscher/omnia-conda-recipes,peastman/conda-recipes,omnia-md/conda-recipes,cwehmeyer/conda-recipes,cwehmeyer/conda-recipes,marscher/omnia-conda-recipes,marscher/omnia-conda-recipes,danielparton/omnia-md-conda-recipes,mpharrigan/conda-recipes,jchodera/conda-recipes,danielparton/omnia-md-conda-recipes,jchodera/conda-recipes,cwehmeyer/conda-recipes,rmcgibbo/conda-recipes,peastman/conda-recipes,marscher/omnia-conda-recipes