Sorted PROPERTIES of User model
Merge pull request #220 from mdxs/sort_user_model

Sorted PROPERTIES of User model
Replacing Flask-OAuth with Flask-OAuthlib
Merge pull request #218 from mdxs/use_flask_oauthlib

Replacing Flask-OAuth with Flask-OAuthlib
Added Yandex.Metrika web analytics (http://metrica.yandex.com).
Fix Yandex Metrika field generation and added help-block.