Pin to latest version of django 1.5

Just a suggestion, so that users get the latest django security release (currently 1.5.9).

Add to contributors and reference the Chrome extension

Remove unused ugettext import

Fix url regexp.

Improve bookmarklet

\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(...)`).

Use jQuery because you're checking for window.jQuery

Some sites put jQuery into noConflict mode and don't bind to $. One example is http://shop.timberland.com/ so the pinry bookmarklet would not work. It will throw a 'document does not have a method ready' error. This change just wraps all of the jQuery specific code to use the current jQuery as $.

http://api.jquery.com/jQuery.noConflict/

latest.

everything from pypi instead of pulling from git repos.