Update Python REST demo to accept operations as ACTION/RESOURCE/ID1/ID2

[RobPasMue]

As it was done in the C++ implementation, we should also make this same implementation for the Python version.

It consists on allowing operations via URL without a body request

For example:

Instead of curl -X GET http://localhost:XXXX/add/Matrices ... -d {"id1": 5, "id2" : 27 }
Something like curl -X GET http://localhost:XXXX/add/Matrices/5/27