ignore phone links

[robfentress]

Phone links--anchor tags whose href attribute begins with tel:--should not be scanned.

For example, the following code results in a scan of the URL http://my.domain.com/tel:+11231231234, when it shouldn't:

<p>Phone: <a href="tel:+11231231234">1-123-123-1234</a></p>

[tjscollins]

Thanks. Fixed in 0.5.5 77e5d5c