Demo Docs for how to create an ePSF appear to be out of date

[prappleizer]

When attempting the import line of the demo of how to create an epsf, you get

ImportError: cannot import name 'convolve' from 'dfpsf.doubleKernel.matchingPSF' (/Users/ipasha/Dropbox/github/MothraRepos/dfpsf/src/dfpsf/doubleKernel/matchingPSF.py)

[crhea93]

Thank you for pointing this out! It had been moved to a new file.

[crhea93]

Resolved in #11