Fixed #420: Xing provider references VkProviderSettings
Update password-plugins.md

Minor typo
Merge pull request #422 from jeantil/cleanup/loggers

Use named loggers for all providers logging
updated changelog for #422
Merge pull request #421 from jeantil/refactor/project_defintions

Use an aggregator project
Merge pull request #424 from noobii/patch-1

Update password-plugins.md
Move Http calls from OAuth1 providers to OAuth1Client

Add test coverage for default OAuth1Client
Add Integration test for Google login flow

This is to prepare the heavier Oauth2Provider refactoring where we will extract an OAuth2Client
Extract an OAuth2Client shared by various providers
Separate authentification request from provider callbacks in OAuth2Provider
Pass an implicit execution context to IdentityProvider#authenticate and IdentityProvider#authenticateForApi
Remove meaningless results from authenticate call