Prefer fetching descriptions and link annotations with path as target

[millicentachieng]

When fetching descriptions, summary, and external doc links for generated paths, use path as the default annotation target, if no annotations are found, check annotations on type of last segment of path.

Sample target paths (source):

• MySchema.MyEntityContainer/MyEntitySet
• MySchema.MyEntityContainer/MySingleton
• MySchema.MyEntityContainer/MyActionImport
• MySchema.MyEntityContainer/MyFunctionImport
• MySchema.MyAction
• MySchema.MyAction(MySchema.MyBindingType)
• MySchema.MyAction(Collection(MySchema.MyBindingType))
• MySchema.MyAction()
• MySchema.MyFunction
• MySchema.MyFunction(MySchema.MyBindingParamType,First.NonBinding.ParamType)
• MySchema.MyFunction(First.NonBinding.ParamType,Second.NonBinding.ParamType)
• MySchema.MyFunction/MyParameter
• MySchema.MyEntityContainer/MyEntitySet/MyProperty
• MySchema.MyEntityContainer/MyEntitySet/MyNavigationProperty
• MySchema.MyEntityContainer/MyEntitySet/MySchema.MyEntityType/MyProperty
• MySchema.MyEntityContainer/MyEntitySet/MySchema.MyEntityType/MyNavProperty
• MySchema.MyEntityContainer/MyEntitySet/MyComplexProperty/MyProperty
• MySchema.MyEntityContainer/MyEntitySet/MyComplexProperty/MyNavigationProperty
• MySchema.MyEntityContainer/MySingleton/MyComplexProperty/MyNavigationProperty
• MySchema.MyEntityContainer/MySingleton/MyContainmentNavigationProperty
• MySchema.MyEntityContainer/MySingleton/My.EntityType/MyContainmentNavProperty
• MySchema.MyEntityContainer/MySingleton/MyComplexProperty/MyContainmentNavProp