Release of v5.1.1-alpha1

Move all banners to GitHub. Adds library phpspreadsheet to JCB. Adds import item example to demo component. Updates the Superpower class with the GetRemote class in the plugin. Ensures the super power autoloader triggers the correct repositories.

ComponentbuilderInstallerScript.php

@@ -3292,7 +3292,7 @@ class Com_ComponentbuilderInstallerScript implements InstallerScriptInterface
 			echo '<div style="background-color: #fff;" class="alert alert-info"><a target="_blank" href="https://dev.vdm.io" title="Component Builder">
 				<img src="components/com_componentbuilder/assets/images/vdm-component.jpg"/>
 				</a>
-				<h3>Upgrade to Version 5.1.0 Was Successful! Let us know if anything is not working as expected.</h3></div>';
+				<h3>Upgrade to Version 5.1.1-alpha1 Was Successful! Let us know if anything is not working as expected.</h3></div>';
 
 			// Add/Update component in the action logs extensions table.
 			$this->setActionLogsExtensions();