Adding support for ActivateAttribute via IControllerActivator

This mechanism replaces code in Inject that activated properties
by looking them up by names.
Fixing the TODOs dependent on SimpleDisplayText.
Catch MVC up with Helios rename
- allows builds to succeed after cleaning your repo (without NuGet.org source)
Merge branch 'release' into dev
Catch MVC up with Helios rename
- one more file to change on dev branch
Add Autofac functional test.

Added very simple Autofac functional test that validates that we can add custom classes to the DI system as well as just use the ones provided to us.

#669
Revive ModelMetadata.ShowForDisplay and ModelMetadata.ShowForEdit

Fixes #679
Reacting to HttpAbstractions changes
Get ModelBinding test project working on K10 again
- restore `ClientRulesWithCompareAttribute_ErrorMessageUsesResourceOverride` since
  DataAnnotations has fixed underlying problem
NET45-ify our Autofac functional test
- see loads of load failures after `kvm.ps1 upgrade -svrc50` otherwise
Remove K10 configuration from AutofacWebSite
Commonize code to limit functional tests to a single site each
React to resource changes