Add tracer wrapping DefaultHttpControllerTypeResolver (fixes 1215)
- https://aspnetwebstack.codeplex.com/workitem/1215
- "Trace exceptions in DefaultHttpControllerTypeResolver"
- Only change to DefaultHttpControllerTypeResolver public API is to make
IsControllerTypePredicate property virtual (this allows tracer override);
property remains protected

nit: Update old comments mentioning GetExportedTypes
Remove EditorFor HTML attribute handling inconsistencies (fixes #1434)
- https://aspnetwebstack.codeplex.com/workitem/1434
- "Remove EditorFor HTML attribute handling inconsistencies"
1. Remove special cases for collections and complex types
2. htmlAttribute renamed to htmlAttributes