66 add script to merge datasets

[funkchaser]

What type of change is this?

• New feature in a backwards-compatible manner.
  Resolves Add script to merge datasets #66,

Checklist

• I added a line to the CHANGELOG.md file in the Unreleased section under the most fitting heading (e.g. Added, Changed, Removed).
• I ran all tests on my computer and it's all green (i.e. invoke test).
• I ran lint on my computer and there are no errors (i.e. invoke lint).
• I have added tests that prove my fix is effective or that my feature works.
• I have added necessary documentation (if appropriate)