Moved request parameters to constants. Fixed auth for device pinned accounts
Integration tests
Update BoxClient.cs

Use IAuthRepository replace AuthRepository in BoxClient, then I could replace it by my auth repository implementation.
BoxClient Updates to accept converter, service and auth
SDK Integration tests
Demonstrate bug in handling of compressed content

We can now add the Accept-Encoding header to the request via
IBoxConfig.AcceptEncoding. However, HttpClient isn't configured to
automatically decompress content, so gzipped responses will fail.
Enable automatic decompression of response content

- The HttpClientHandler must have 'AutomaticDecompression' enabled to
properly handle content that's compressed per IBoxConfig.AcceptEncoding.
- Add Microsoft.Net.Http package to Box.V2.Test.Integration to resolve
integration test compilation issue (see
http://davidburela.wordpress.com/2013/07/12/error-when-using-http-portable-class-library-compression/)
Resolve test failure

- Add Microsoft.Net.Http package to Box.V2.Test to resolve
MethodNotFound exception (see
http://davidburela.wordpress.com/2013/07/12/error-when-using-http-portable-class-library-compression/)
Add integration test for same.
Implement BoxUsersManager.GetEnterpriseUsersAsync
Fix sample app and integration tests
Refresh Hanlder added to authrepository
Updated authenticated event handler to return new session