Auto generate version file

[nedga055]

The version file is used to help track the latest release of the application and the git commit that was used to created it. It could be used in a couple of different contexts:

1. Identifies the version info for a release package in case we need to provide the code for an individual release.
2. Add application version information to log file.

• Add a script that will auto-generate a version.json file.
• Use git describe to get the current release tag.
• Use git rev-parse HEAD to get the latest commit tag for the current branch.
• Output the results to a version.json file which should look like:

{
"version": "1.1.3",
"git_commit": "90jdf09u029jdjsf093j209jdksljfs"
}

Example bash script can be found in the ROEC API repo. However, it may be beneficial to flask_script Command and make it available via manage.py.

[Collinbrown95]

Addressed in PR #13