Removed temporary code which used to create a 'CPAC-backup' folder when overwriting installs - this lead to errors when the user did not have sudo rights.
Removed temporary code which used to create a 'CPAC-backup' folder when overwriting installs - this lead to errors when the user did not have sudo rights.

danlurie/C-PAC,roijo/C-PAC_complexitytools,roijo/C-PAC_complexitytools,sgiavasis/C-PAC,danlurie/C-PAC,danlurie/C-PAC,sgiavasis/C-PAC,danlurie/C-PAC,sgiavasis/C-PAC,sgiavasis/C-PAC,roijo/C-PAC_complexitytools,roijo/C-PAC_complexitytools