Made correction on  core data bundle name
Core data model bundle is included in the OpenpeerSDK.framework. Exception is thrown if core data model object is not created.
After application update, settings are  updated.

https://github.com/openpeer/opios/issues/244
Settings 4 bug fixes. Removing unused code. Adding comments.
If identity provider domain is changed, relogin info is deleted and user is forced do to login again.
Handling login/relogin when server is changed.
Added more logs to cover downloading settings. Fixed bug with content type header.
Merge branch 'feature-20140402-bug-fixing' into 20140401-dev-stable