Add preliminary support for TwistedBipartitions

[james-d-mitchell]

No description provided.

[james-d-mitchell]

Due to a conflict if you want to use this branch again Matthias, please do (before making any changes):

git fetch jdm twisted-bipartitions
git reset --hard jdm/twisted-bipartitions

[Matthias-Fresacher]

I have done that. I fixed a small typo and tried to push that to your repository but it says:

ERROR: Permission to james-d-mitchell/semigroups.git denied to Matthias-Fresacher.
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.

I wanted to show you an error that now exits when I load GAP:

Loading the library and packages ...
#I method installed for IsSelfDualSemigroup matches more than one declaration in /gap-4.14.0/pkg/smallsemi/gap/properties.gi:528

I have a feeling that does not have anything to do with what we are doing.

P.S. What is the text editor you are using?

[Matthias-Fresacher]

I am still having the issue of not being able to push to the repository:

ERROR: Permission to james-d-mitchell/semigroups.git denied to Matthias-Fresacher.
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.