Add codemeta.json metadata file

Add codemeta.json metadata file for testing with Zenodo preservation.

Improved connect formatting and python 3 compatibility

New version that has corrected string formatting for CONNECT section and is compatible with python 3. Thanks to @sunhwan for the improvements!

psf2pdb Preservation Release

Release of psf2pdb with short documentation for preservation on Zenodo.

Initial script

v0.1

Create psf2pdb.py