Move to the frameworks input class

## Executive Summary
This PR moves from the CMS input class to the frameworks input class

## Testing
To test just navigate around the CMS - the Input class will be used on every single page. Make sure things like urls work, redirecting works, saving items works etc.
@wilsonge 

can you have a look into this?

`'/libraries/joomla/string/normalise.php',`

`'libraries/joomla/input/input.php',`

I think we miss the `/` here (bevor libraries) :smile: