#16 | Create and Implement Standard Return Codes (#17)
* Reformatted imports section of log script and added return code section with table to functions README.md
* Corrected formatting of return value table in functions README.md
* Finalized return code table in functions README.md, updated code and docs to reflect it, and fixed header/footer creation bug in output
* Apply suggestions from code review
Made same change to text of return code 0 everywhere.
* Changed help listing in options section of doc to be on one line in all docs.