Expand copy command

Merged DJ Mountney requested to merge twk3/gitlab-development-kit:expand-copy-command into master

Switched Makefile to use full cp command, as the shortcut being used before not always being expanded, depending on the shell being used.

On Ubuntu the default shell for make is /bin/sh instead of /bin/bash, sh doesn't support expanding the curly braces on commands.

Fixes #6 (closed)

Tested on Ubuntu 14.04