Upgrading to Identity 2.0
Preparing for v2
Preparing for v2, updated licenses
updated to nest 1.x-beta, identity 2.x
Support for additional interfaces
 * UserTwoFactorStore
 * IUserEmailStore
 * IUserPhoneNumberStore
 * Added basic tests
updated readme
added parameter validation for indexName, more tests
fixed default connection string in tests
merged identity_2.0