add segmentmodel_from_cadnano

mrdna/readers/.gitignore

mrdna/readers/.ipynb_checkpoints/test-checkpoint.ipynb

mrdna/readers/.nfs0000000000093fec000043e9

mrdna/readers/__init__.py

mrdna/readers/list.pdb

mrdna/readers/list.psf

mrdna/readers/segmentmodel_from_cadnano.py

mrdna/readers/test.ipynb

mrdna/readers/test.json

mrdna/readers/test/Na_liu.json

mrdna/readers/test/rest_scaf_col.json

mrdna/readers/test/test.ipynb

mrdna/readers/test/test.json.oxdna

mrdna/readers/test/test.json.top

mrdna/readers/test/test.seq.json

mrdna/readers/test/test.virt2nuc

mrdna/readers/test/test2.ipynb

mrdna/readers/test/test3.ipynb