Fix #183, Create Changelog File

[ArielSAdamsNASA]

Checklist (Please check before submitting)

• I reviewed the Contributing Guide.
• I signed and emailed the appropriate Contributor License Agreement to GSFC-SoftwareRelease@mail.nasa.gov and copied cfs-program@lists.nasa.gov.

Describe the contribution
Fixes #183

Testing performed
N/A

Expected behavior changes
Users can see important information on readme without changelog information.

Contributor Info - All information REQUIRED for consideration of pull request
Ariel Adams, MCSG Tech