twitter.js: linkify: detect links with #

## Problem
Links with a hash sign are not identified correctly.

## Example
http://christianv.github.io/jquery-lifestream/me/#twitter=ahtanu (the link with google maps preview) 
![image 2014-02-05 at 12 58 12 pm](https://f.cloud.github.com/assets/817381/2086687/dd6dd5fa-8e5c-11e3-9dd4-9857b2ff37f3.png)

## Fix
Replaced the regular expression with one that can identify these kind of links.

Twitter also provides a library to parse text, might be a better/more robust solution to parse tweets: https://github.com/twitter/twitter-text-js