Updated readme, comments, and help/quit functionality

[mochiman]

Planning on adding a release to releases page if this is good. Implemented help and quit function described in readme.

[ssmethurst]

Version numbers:

• If you change the source code then you must update the version number that the application reports.. Increment the patch version

  BACnetServerExampleCSharp/BACnetServerExample/Program.cs

  Line 52 in 943deeb

  const string APPLICATION_VERSION = "0.0.1";

• Add or update the CHANGELOG.md in the root directory with notes about what has changed in this version.

• Tag the commit with the version number so it shows up on the release page.

[mochiman]

I somehow missed the Program.cs file in the last commit. I have updated the version number, implemented the changelog, and tagged the commit.