Add cURL examples to Images Getting Started

Github issue: #119

author: diane fleming
Merge branch 'curl-examples'

Moved curl examples to the right location in the file as well.

Conflicts:
	src/docs/files/samples/auth_client.rst
	src/docs/images/samples/authentication.rst
	src/docs/images/samples/create_image_member.rst
	src/docs/images/samples/delete_image_member.rst
	src/docs/images/samples/export_image.rst
	src/docs/images/samples/get_image.rst
	src/docs/images/samples/get_image_member.rst
	src/docs/images/samples/import_image.rst
	src/docs/images/samples/list_image_members.rst
	src/docs/images/samples/list_images.rst
	src/docs/images/samples/update_image.rst
	src/docs/images/samples/update_image_member.rst