Automate version flags

[cefect]

the CanFlood version tag (e.g., 1.2.0) is set in many places:

• build.ui
• metadata.txt
• docs/source/conf.py
• github
• ??

These are all supposed to be set manually during deployment, and therefore rarely all match.

I propose the following:

1. Include a version tag on the model.ui and results.ui (like the build.ui)
2. set a single location for the version tag (./canflod/__init__.py)
3. ./dev_tools/set_version.bat script to pull the version tag and update as many of these as possible (eventually, we can incorporate this script into some sort of deployment routine)

[NickyHastings]

good suggestion