Fixed python control loop example

Python code did not match robot program

Fixed issue UniversalRobots#3 - added tags

Fixed issue UniversalRobots#2 - added setup.py and setup.cfg to release package
Fixed issue UniversalRobots#1 - removed depenency on VERSION file
- Readme file update with instructions for running inside venv,
and with dockerized ursim
- Removed dev package intended only for internal UR use

v2.7.0 release