connect_from
Description:
Makes a connection between the pads of two nodes.
Returns TRUE if the connection was successfully made.
Parameters:
| this | the node we're connecting an input to | 
| input_pad_name | the name of the input pad we are connecting to | 
| source | the node producing data we want to connect. | 
| output_pad_name | the output pad we want to use on the source. |