Discover views registered from other assemblies

This fixes a bug discovered by Rex Whitten and mentioned in the mailing
list:
https://groups.google.com/d/msg/nancy-web-framework/9N4f6-Y4dNA/ZcGu35SBMoYJ
Fix whitespace
Add extension helper for embedded static content
Update xml documentation
Including `Rootnamespaces` should not break ignore
Move embedded resource provider to Nancy.Embedded
Rename the embedded view location provider
Add registrations class
Remove `System.Reflection` from registrations
Add docs
Rename the embedded view location provider
Rename the embedded fixture
A minor rewrite of some parts of the embedded view location provider
Removed failing tests. They're not needed anymore since we don't throw exceptions if there's only one view found
Add tests for new root namespace behavior
Format embedded tests fixture