Update weblink.php

Modified to use Helper instead of Library
Merge pull request #84 from davidhurley/patch-1

Update weblink.php
Update JHelperTagsTest.php

Modified to be designated as helper instead of library.
Merge pull request #85 from davidhurley/patch-2

Update JHelperTagsTest.php
Merge branch 'master' of https://github.com/joomla/joomla-cms into movingday
Merge branch 'movingday' of https://github.com/elinw/joomla-cms into movingday
Merge branch 'movingday' into tagItemchanges