Constraint Demotion
restructuring
simple GUI

- very simple GUI based on tkinter
- report error for contradictary constraints (no never-losing ones)
General Impovement: correction, comments

- Correct the implementation of Constraint Demotion
Mainly caused by incaution with positive degrees when subtract() and
discard() explainable candidates
- work rightly for "Ilokano.txt"
- resolve the errors when running "Hebrew.txt"
- improve comments
- improve codes
- rearrange
- InputError for tableau module
- check input for harmonically bounded surface(winner) form
- GUI: message box for ERROR infomation
Fusional Reduction (FRed)

- FRed
- use Menubar
Delete Irrelevent Files

:-)