Introduced IRequestTrace interface
Renamed RequestTrace to DefaultRequestTrace
Improved request tracing

- Introduced IRequestTrace interface
- Renamed RequesetTrace to DefaultRequestTrace
- Introduced RequestData and ResponseData
- Introduced IRequestTraceFactory interface
- Implemented DefaultRequestTraceFactory
- Updated DefaultNancyContextFactory to use IRequestTraceFactory
- Added missing XML comments
Added missing XML comments to ITraceLog implementations
Renamed TraceLog to DefaultTraceLog
Added missing XML comments
Added XML comments to DiagnosticsViewRenderer
Added XML comments to DisabledDiagnostics
Moved StaticConfigurationContext to Nancy.Testing
Fixed broken tests
Merge pull request #1477 from thecodejunkie/tracelog-refactoring

Tracelog refactoring