Clarify README for CLI options

[rnc]

Fixes #207
Fixes #194

[goldmann]

@rnc I imagine you wanted to change this:

docker-squash/docker_squash/cli.py

Lines 52 to 76 in 96a2631

	def run(self):
	parser = MyParser(
	description='Docker layer squashing tool')
	parser.add_argument(
	'-v', '--verbose', action='store_true', help='Verbose output')
	parser.add_argument(
	'--version', action='version', help='Show version and exit', version=version)
	parser.add_argument('image', help='Image to be squashed')
	parser.add_argument(
	'-d', '--development', action='store_true', help='Does not clean up after failure for easier debugging')
	parser.add_argument(
	'-f', '--from-layer', help='Number of layers to squash or ID of the layer (or image ID or image name) to squash from. In case the provided value is an integer, specified number of layers will be squashed. Every layer in the image will be squashed if the parameter is not provided.')
	parser.add_argument(
	'-t', '--tag', help="Specify the tag to be used for the new image. If not specified no tag will be applied")
	parser.add_argument(
	'-m', '--message', help="Specify a commit message (comment) for the new image.")
	parser.add_argument(
	'-c', '--cleanup', action='store_true', help="Remove source image from Docker after squashing")
	parser.add_argument(
	'--tmp-dir', help='Temporary directory to be created and used')
	parser.add_argument(
	'--output-path', help='Path where the image should be stored after squashing. If not provided, image will be loaded into Docker daemon')

Readme just reflects whats in the CLI.

[goldmann]

Ah, all good, I was reading wrongly the diff.