In my previous post (http://zimmergren.net/sp-2013-some-new-delegatecontrol-additions-to-the-sharepoint-2013-master-pages) I talked about how you could use the new delegate controls in the master page (seattle.master) to modify a few things in the SharePoint UI, including the text in the top left corner saying "SharePoint". If your goal is simply to change the text, or hardcode a link without the need for any code behind, you could do it even easier with PowerShell.

Changing the SharePoint text to something else using PowerShell

Before:

After:

PowerShell Snippet

$webApp = Get-SPWebApplication http://tozit-sp:2015
$webApp.SuiteBarBrandingElementHtml = "Awesome Text Goes Here" 
$webApp.Update()

Enjoy.