This change moves [BindingBehavior(...)] and friends into the model
metadata layer, and removes the reflection code from
MutableObjectModelBinder that was looking for them previously.
This change adds more information to ModelAttributes, so that metadata
providers can look at the attributes on the property and type separately
if so desired
Separates the MMP into two phases:
1). Creation of the ModelMetadata, discovery of properties and attributes
(reflection) is part of the MMP
2). Lookup of details based on attributes is now part of another phase,
and has its results cached.
Users can now implements and register an IFooMetadataProvider to customize
a single aspect of metadata (see how data annotations does it).
Ryan Nowak
Harsh Gupta