Verbosity and Examples updates as well as some functional updates

[cjpalmer]

Great module. I started testing it in my environment and found a few issues to clean up and while trying to figure it out, I found that some of the functions were not verbose enough for easy discovery. I started updated functions with verbosity and then additional help (added help to some, extended help on others). I also found the need to update the functionality of Test-ExternalDNSServers because it assumes that outbound ping is allowed. That is not always the case so I added a fallback test that would verify TCP-53 (with the assumption the UDP-53 would work as well) and allowed that to pass the test. I also extended the sample script for creating the scheduled tasks and then updated the build to include that script with the module. I hope you find my additions and updates helpful.

[cjpalmer]

The updates in this pull request address (at least in part) Issue #101 , #96 , and #90