Moved 'haveResponse' from the Http web request to the parent.
Added an unofficial 'Status' header.
Created a Net utility class with an initial ProcessHeaders() method for processing web headers.
Updated header-processing to implement the Net::ProcessHeaders() utility.
Fixed a variable-name typo in Net::ProcessHeaders().
Added Http Status-Code processing.
Update the haveResponse flag when getResponse() is successful.
Updated first-stage WebRequest tests.