Add IDTxl to the Python Package Index (pypi)

[LNov]

It would be convenient to add IDTxl to pypi so that users can easily install it by typing 'pip install idtxl'.

https://packaging.python.org/tutorials/packaging-projects/

[sepehrmn]

Is there any info on when we could install the latest release via pip?

It would be good to be able to easily let users install all of the requirements for a repo by running pip install -r requirements.txt and not have to do anything special for one of the requirements.

[oleg-kachan]

Requirements handling now is troublesome,

the user should find out by trial and error that IDTxl depends on Java, Java JDK, python's Jpype1, prettytable, ecos, pyopencl packages, just to run a single demo,

and I'm unsure if there are other requirements for run other parts on IDTxl code.

[awillats]

This would also allow IDTxl to be run in web environments through pyodide: https://pyodide.org/en/stable/usage/loading-packages.html