VISTOMS update:

1.) Added download functions for KDMS & CMDOWS files for one graph, or all uploaded graphs.
2.) Added upload of zip files as database
3.) Changed initialization of app.py. Can now be called with arguments "folder" and "open_vistoms"


Former-commit-id: 3811c0f7bf52350ac46147e0027d916e7091c0e6