Unit Tests Totals

The unit tests page now displays the number of total tests, the number of total successes, and the overall success percentage at the top.
HTTP Response Body Encoding

Added a method -- GetBody -- to the HTTP\Response class which searches the response headers for an appropriate header (a "Content-Type" header with "charset" set) to determine the encoding of the response's body.  It then uses the String\ConvertFrom method to transcode the body to UTF-8 and return it.  If an appropriate header is not found, UTF-8 is used as a fallback.

This allows for the seamless consumption of HTTP resources that do not use UTF-8, while simultaneously leaving the raw bytes of the body available.

Refactored the places where the HTTP\Response class is used to use the GetBody method rather than accessing the $body field directly.