Change release date

Release will be today.
Readme changes

There's no NCE installer.
Version number fix

Winbuild had a wrong version number
Remove old winbuild code

Forgot to remove the old winbuild code from winbuild.py . Whoops.
Another windows builder fix

NCE has no charcodes.txt
PyQt4 -> PyQt5 changes

Thank goodness I have a script that does this automatically.
Version bump: 1.2

Source code now refers to version 1.2