Added user_forgot to not_redirect_urls
Merge pull request #232 from topless/patch-1

Added user_forgot to not_redirect_urls
External path as a variable
Merge pull request #235 from topless/patch-2

External path as a variable
Used Flask-RESTful for API.
Fix fields type.
Improved API errors handler.
Added request.query_string value to JSON link.
Added 'check_unique_email' field to config API.
Sorted properties in CONFIG_FIELDS.
Added recaptcha fields.
Minor fix.
Sorted User fields.
Update CONFIG_FIELDS.
Added Auth API.