Update Flask integration example
Update Flask integration example

Updated the Flask integration example to avoid making all other static stuff unavailable, as per https://github.com/mher/chartkick.py/issues/5#issuecomment-41468790
zknyoyo/chartkick.py,zknyoyo/chartkick.py,mher/chartkick.py,mher/chartkick.py,zknyoyo/chartkick.py