Fix incorrect path for geard-image service file.

The geard-image service file refers to /etc/systemd/systemd instead
of /etc/systemd/system. This causes attempts to start or restart a
service over the HTTP interface to fail:
alter_container_state: Unable to persist whether the unit is started on boot: symlink /var/lib/containers/units/te/ctr-test-1.service /etc/systemd/system/container-active.target.wants/ctr-test-1.service: no such file or directory
WIP gear - Do not report error if file missing

* Add check for file existing
* Add COPYRIGHT and LICENSE files
Remove -e to make script simpler
Merge pull request #58 from smarterclayton/setup_bug

Remove -e to make script simpler
Merge pull request #54 from garycoady/geard_image_unit_fix

Fix incorrect path for geard-image service file.
Merge pull request #57 from jwhonce/bug/missing_links

WIP geard - Do not report error if file missing
Print warning messages if geard-githost is not started
Update install instructions to be clearer
Merge pull request #59 from smarterclayton/init_messages

Instead of starting geard-githost, print warning info
Build script improvements

Small improvements to the build script:
- Refactor the local build to improve clarity of build output
- Improve error handling
- Fix Docker build