Tag Search for Addicted to Flickr

I wrote a small patch for Addicted to Flickr that adds support for the flickr.photos.search method.

Examples of use:

$result = $flickr->getTagSearchPhotos('','aircanada','all',1,15);

This will return the most recent 15 photos tagged 'aircanada'.

$result = $flickr->getTagSearchPhotos('','aircanada,airplane','all',1,15);

This will return the most recent 15 photos tagged 'aircanada' and 'airplane'.

$result = $flickr->getTagSearchPhotos('','charlottetown,london','all',1,15);

This will return the most recent 15 photos tagged 'charlottetown' or 'london'.