* Added -hostfile=file option, allowing for a file of hosts (one per
line) to be scanned instead of reading off the args. 
* Added hostname lookup validation of all hostnames prior to scanning
* Added elementary-but-extensible URL validation for the apiLocation
Formatting oopsie
Merge pull request #2 from cognusion/feature-hostnamefile

-hostfile option, and some validations
Embed the address of the development API server.
Require a valid server certificate.
Formatting.
Update README now that it's no longer necessary to specify the API endpoint.
Rename LabsSimClient.IsModern to IsReference, following the change in the APIs.
Add the API docs.
Don't perform DNS loopkup of the API hostname. This check fails with hostnames that are hardcoded in /etc/hosts.
Output response status code at DEBUG level.