Coppercube plugin - Move a node with keys

This script is built on the same principle as the Coppercube moveCamera script, made by Satguru P Srivastava (later adjusted by Robbo). In that script you may move the editor camera view with Ctrl + arrow keys. Robbo made it ever more clever so that one could adjust the amount of movement. My script works the same way but instead moving a selected node object in the scene. Movement is handled with Alt + arrow keys, and Alt+Shift+ arrow up/down. To change the movement amount do so in the menu under: Edit/Plugins/Node move amount. 

For those new to Coppercube: The script is to be placed in the Coppercube plugins folder