* Draft section on ApiInfo in getting started
* typo: to --> do
* Add link to github api
* Add note on authenticated client limits
* wording tweak
* Point to better API doc link
* change variable init in code sample
* Code to test URL for an enterprise instance.
Based on code we use in GitHub Desktop for Windows.
* Add an example of the enterprise probe
* Add helpful constructor to EnterpriseProbe
* Suppress code analysis warning
Add xml comments to ctors and make consistent with GitHubClient/Connection etc
* Update getting started to use the new EnterpriseProbe ctor
