safety save
fixes to image-magick demo to work with gce v1 api
also, change default image from centos to debian
revert from test version (im) of app to default version (1)
review comments response to kbrisbin
simplify pattern matching when searching for image to use
formatting comment fixed (avoid compound args
Merge pull request #18 from GoogleCloudPlatform/image_magick_fix

Image magick fixes for gce v1 api and change default image for suite from centos to debian