get_login_redirect_url was invoked prematurely (closes #228)
Added support for overriding the social account connect redirect URL (closes #227)
Added  to documentation
Versioning dependencies (closes #231)
Added Travis status image
Updated linkedin social account

added the following info to linkedin social account:
get_profile_url
get_avatar_url
to_str
Merge pull request #233 from arctelix/linkedin-name

Linkedin account update