Added new Spacetime files

[CPKalb]

Pull Request Testing

• Describe testing already performed for these changes:
  
  Tested the scripts offline.

• Recommend testing for the reviewer(s) to perform, including the location of input datasets, and any additional instructions:
  
  Check the code to make sure it all makes sense. We will be able to do a more thorough test when the METplus use case is merged (which has to happen after this pull request is completed)

• Do these changes include sufficient documentation updates, ensuring that no errors or warnings exist in the build of the documentation? [Yes or No]
  Yes

• Do these changes include sufficient testing updates? [Yes or No]

• Will this PR result in changes to the test suite? [Yes or No]
  
  If yes, describe the new output and/or changes to the existing output:
  
  Will include changes in the METplus output but I don't think here

• Please complete this pull request review by [Fill in date].
  
  as soon as possible

Pull Request Checklist

See the METplus Workflow for details.

• Review the source issue metadata (required labels, projects, and milestone).
• Complete the PR definition above.
• Ensure the PR title matches the feature or bugfix branch name.
• Define the PR metadata, as permissions allow.
  Select: Reviewer(s)
  Select: Organization level software support Project or Repository level development cycle Project
  Select: Milestone as the version that will include these changes
• After submitting the PR, select Development issue with the original issue number.
• After the PR is approved, merge your changes. If permissions do not allow this, request that the reviewer do the merge.
• Close the linked issue and delete your feature or bugfix branch from GitHub.

[hankenstein2]

Looks good