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(...)`).
Merge pull request #65 from lapo-luchini/bookmarklet

Improve bookmarklet
Merge pull request #62 from tomwys/patch-2

Fix url regexp.
Merge remote-tracking branch 'upstream/master'