Begin low-level API for Image v1 and v2

image list for v1 and v2:
* Add --public|--private to command parsers
* Implement local public/private filtering for v1 image_list()
* Pass public/private filter to server for v2 image_list()

Change-Id: Ie7c24ea2d1bf2b3b1b7fa342eb45fee45894634d

openstackclient/api/image_v2.py

@@ -0,0 +1,69 @@
+#   Licensed under the Apache License, Version 2.0 (the "License"); you may
+#   not use this file except in compliance with the License. You may obtain
+#   a copy of the License at
+#
+#        http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#   WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#   License for the specific language governing permissions and limitations
+#   under the License.
+#
+
+"""Image v2 API Library"""
+
+from openstackclient.api import image_v1
+
+
+class APIv2(image_v1.APIv1):
+    """Image v2 API"""
+
+    def __init__(self, endpoint=None, **kwargs):
+        super(APIv2, self).__init__(endpoint=endpoint, **kwargs)
+
+        # Hack this until discovery is up, and ignore parent endpoint setting
+        self.endpoint = '/'.join([endpoint.rstrip('/'), 'v2'])
+
+    def image_list(
+        self,
+        detailed=False,
+        public=False,
+        private=False,
+        **filter
+    ):
+        """Get available images
+
+        can add limit/marker
+
+        :param detailed:
+            For v1 compatibility only, ignored as v2 is always 'detailed'
+        :param public:
+            Return public images if True
+        :param private:
+            Return private images if True
+
+        If public and private are both True or both False then all images are
+        returned.  Both arguments False is equivalent to no filter and all
+        images are returned.  Both arguments True is a filter that includes
+        both public and private images which is the same set as all images.
+
+        http://docs.openstack.org/api/openstack-image-service/2.0/content/list-images.html
+
+        TODO(dtroyer): Implement filtering
+        """
+
+        if public == private:
+            # No filtering for both False and both True cases
+            filter.pop('visibility', None)
+        elif public:
+            filter['visibility'] = 'public'
+        elif private:
+            filter['visibility'] = 'private'
+
+        url = "/images"
+        if detailed:
+            # Because we can't all use /details
+            url += "/detail"
+
+        return self.list(url, **filter)['images']