C++ Network Library Code

Merging integration_0_4 r210 into trunk.

Adding stubs in the URI documentation.

Adding missing simple_wget quickbook file.

I added some tests for the URI. Added a simple wget example, including documentation.

Merging from urllib-dean r205.

Implementing tag-based dispatching for string type deduction in the hostname parser.

Test and supporting implementation for invalid formatted hostnames.

Integrating URI implementation to be used in HTTP request message.

Adding network client and server hints.