Add a with-open macro, fixes #57
Add a with-open macro, fixes #57

mfikes/planck,slipset/planck,mfikes/planck,ericstewart/planck,mfikes/planck,slipset/planck,slipset/planck,slipset/planck,mfikes/planck,mfikes/planck,slipset/planck,ericstewart/planck,ericstewart/planck,mfikes/planck