Fix url regexp.
Fix url regexp.

\d allows numbers from other digit systems, so urls like: http://demo.getpinry.com/१७/ are possible. This could lead to some nasty security issues in the future (ie. if you try to use pin number without using `int(...)`).
pinry/pinry,QLGu/pinry,pinry/pinry,wangjun/pinry,pinry/pinry,Stackato-Apps/pinry,QLGu/pinry,lapo-luchini/pinry,lapo-luchini/pinry,MSylvia/pinry,MSylvia/pinry,supervacuo/pinry,lapo-luchini/pinry,supervacuo/pinry,wangjun/pinry,lapo-luchini/pinry,MSylvia/pinry,wangjun/pinry,Stackato-Apps/pinry,Stackato-Apps/pinry,supervacuo/pinry,QLGu/pinry,pinry/pinry