Python Group Coherent Presentation Example

[xFrenchy]

Summary

Adding a group coherent presentation example using the Python API

Details and comments

This example is a copy of the already existing group coherent presentation example (in c++) but translated with the new Python API binding. This example will randomly choose when to send samples and when to send a coherent set of samples.

Comments: This is the second pull request. The first one is #520. However I accidentally added a lot of commits to my branch and didn't properly set it up, so this time I used checkout on develop, created a new branch, cherry picked all my commits and this is the current branch now. The current example is not 100% polished yet, there are some code changes to be done and it is pending an investigation in the coherent set info property.

Checks

• [x] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.

[alexcamposruiz]

Nice job on our first Python example on the repo 👍