Blender 2.8 !
Since the Blender devs have officially freezed the 2.8 API, I decided to update the Addon-on for the next big Blender version.
This update closes the #6 pull request from before the freeze and issue #7 asking for the update.
Please take a look at the new README. As of now, the Add-on needs to be installed from the tensionmap.py file inside the ZIP, not the ZIP itself.
I also added items on the TODO list. Wish me luck to find time to implement them :D