vptool installation dependancies and execution

Created by: eroom1966

@JeanRochCoulon I saw a new tool has been created called vptool. I followed the instructions in VPTOOL-readme.txt for installation of packages, then whent to the vptool-example directory trying to run 'runme.sh' results in

openhw/core-v-verif/tools/vptool/vptool-example$ ./runme.sh export PLATFORM_TOP_DIR=/home/moore/git/openhw/core-v-verif/tools/vptool/vptool-example/example-database export PROJECT_NAME="VPTOOL example project" python3 /home/moore/git/openhw/core-v-verif/tools/vptool/vptool-example/../vptool/vp.py -t winxpblue Traceback (most recent call last): File "/home/moore/git/openhw/core-v-verif/tools/vptool/vptool-example/../vptool/vp.py", line 21, in from typing import OrderedDict ImportError: cannot import name 'OrderedDict'

Is this unexpected ? rather than debug this myself, I thought it would be useful to pass back the issue to update the readme

just in case there are OS issues, my OS is NAME="Ubuntu" VERSION="18.04.3 LTS (Bionic Beaver)"