Update TableUserStore.cs GetRolesAsync method

Updated GetRolesAsync method so it would query the roles table instead of the claims table.
Fixes for external login process
Fix for external login process
Merge pull request #3 from tornal/patch-1

Update TableUserStore.cs GetRolesAsync method
Bug fix for login against non external users
Made changes to better support external providers. Google should now work - not backwards compatible.
Add MVC5 example and instructions to readme
Make the class public and add a parameterless constructor

Hi James - great work on this project really like what you are doing: hope this helps;

Adding a parameterless constructor resolve issue in TableUserStore.cs FindAsync which previously resulted in the following error:

<ExceptionMessage>
TableQuery Generic Type must provide a default parameterless constructor.
</ExceptionMessage>

Regards,

James.
Merge pull request #6 from jameskeongchen/patch-1

Make the class public and add a parameterless constructor
Merge pull request #5 from Andorbal/master

Add MVC5 example and instructions to readme