Py-packman

- DCI added
- PyPi update made
- file format for DCI changed
- DCI CH score plot removed from CLI
- Minor fixes in tests and code

- Minor code, documentation improvements, and fixes

- predict_hinge function cleaned
- several code segments optimized
- documentation improved

- Minor fixes
- DCI compatibility added
- ISU webserver optimizations

- Improved GUI
- Minor fixes

Following things added:
1. Entropy submodule with working Packing Entropy method.
2. Improved tutorials and documentation.
3. Test cases are added for molecule, ann entropy submodules
4. GUI improved and Packing Entropy GUI added.