Fix null ref.
Added antiforgery token to all forms.
Reposition the registration page as I broke it.
Merge pull request #635 from alfhenrik/master

FIx register page layout
Fixed formatting
only show supported social providers on login and account pages
- fixed #629
Layout changes for when there are no providers
Fix up the profile page
Line formatting
rename "ProvierName" to "ProviderName"
Merge branch 'master' of https://github.com/davidfowl/JabbR
ensure that provider and identity are unique in the database
- prevent sign-in / user-creation when providerName & identity pair are already present
- fixed #634
Merge pull request #637 from alfhenrik/master

Layout changes
added the ability to display error messages using html helpers
Merge pull request #638 from davidfowl/smoore/m/unique-provider-id-combo

ensure that provider and identity are unique in the database
Remove migration.
Merge pull request #640 from davidfowl/smoore/m/nancy-validation

added the ability to display error messages using html helpers
Cleanup some view logic.
Added ability to migrate older user accounts sing janrain to new system.
- Only support google and twitter for now.
Added support for migrating facebook legacy identities.