nitpicking - same end result

Merge pull request getsling#9 from thanhson1085/master

Update flask_swagger.py

new version

JSON Schema for Swagger 2.0 now disallows 'id' in definitions, so we …

…simply pop before output

new version

fixes getsling#2 and added example for variable parentheses in flask …

…routes

fixes getsling#1 using id instead of name

added support for schema in responses