h5x support does not work on windows

[NicoRenaud]

Describe the bug
On Windows the path of all the pdbs generated in loadData.py should contain double back slash in the path : C:\Users\Name\ ..... instead of single ones. Also the path in the example/h5x/graphs.hdf5 are local to my own machine ...

Environment:

• OS system: Window
• Version: lastest
• Branch commit ID: master

To Reproduce
Steps/commands to reproduce the behaviour:

1. create the hdf5 graph with example/kernel/create_kernel.py
2. launch h5x : bin/iScore.h5x
3. right click on mol and select PyMol

Expected Results
A nice PyMol viz of the interface

Actual Results or Error Info
Unicode error due to the single \ when loading the pdbs

Additional Context
Add any other context about the problem here.