Added preference for Redirect binding.
- When multiple bindings are available from the idp, prefer using Redirect.
- Renamed IdentityProvider.AssertionConsumerServiceUrl (which is terribly incorrect) to SingleSignOnServiceUrl
Only chose supported bindings from metadata.
- Only Http Redirect and Http Post bindings are supported, find and use them and ignore the rest for now.
Prefer redirect binding
- Fixes #120.
- Filter out unspported bindings when loading idp from metadata.