README.md Add more project links

The operational wiki and JIRA links are added.  The Facebook and Twitter
connections are also included.
.gitignore excluding Microsoft ephemeral artifacts

The .gitignore is expanded to include exclusions that GitHub provides by
default when creating a git repository used for Windows development.
This annotated version includes some miscellaneous catches, such as
temporary files produced by a variety of editors.   In addition,
exclusion of Visual Studio Solution and Project files is added, with
explanatory comment.