Adding Int'l Support with Versioned Redirect Templates

<h2>Changes</h2>
<ul>
<li><b>Constants.cs</b><ul><li> 
refactored hardcoded strings into Constants static class</li></ul></li>
<li><b>Redirects.cs</b><ul>
<li>GetRedirects() modified to accept an additional template name - versioned template name.</li>
<li>Added an additional lookup for fast query to pull only the active versions from the context language. </li>
<li>Documented fast query behavior in the comments of not guaranteeing context-specific results</li></ul></li>
</ul>
<h2>Suggestions</h2>
<ul>
<li>Document the placement of the Redirect assembly in the .config file - before vs. after</li></ul>