Changing SpinPunch to Mattermost in copyright

web/templates/footer.html

@@ -4,7 +4,7 @@
         <span class="pull-right footer-site-name">{{ .ClientProps.SiteName }}</span>
     </div>
     <div class="col-xs-12">
-        <span class="pull-right footer-link copyright">© 2015 SpinPunch</span>
+        <span class="pull-right footer-link copyright">© 2015 Mattermost, Inc.</span>
         <a id="help_link" class="pull-right footer-link" href="#">Help</a>
         <a id="terms_link" class="pull-right footer-link" href="#">Terms</a>
         <a id="privacy_link" class="pull-right footer-link" href="#">Privacy</a>