URI normalzer revamp plus many little changes

[geever]

Hi Julien!

I prepared a new patchset for you! Beside some refactoring and smaller changes, managed to write a new class for normalizing URIs for GSB. It's been developed using TDD method and passes all but one of the Google tests (the non-unicode high-bit one is tricky) and more! I added new cases that were missing, like

• caret escaping
• port removal
• credential removal
• malformed IPv4 addresses (in a cost of adding Net::IP::Lite as a dependency)

I hope you like it!

-geever

[juliensobrier]

Thank you! I will try to review it ASAP.