C2MS12 — Need to update references to NASA Goddard Docs

Current document references NASA Goddard docs in the front matter. These should be brought to current versions:

3.2.1 NASA GMSEC Documents
The following GMSEC documents set forth the NASA GMSEC Architecture and the GMSEC Applications Programming Interface User’s Guide. Documents for specific GMSEC-compliant software components should be consulted on an individual basis.
• GMSEC Architecture Document, Release 2.8.1, February 2014
• GMSEC API 4.3 User’s Guide, May 2017