Updated spec. syntax to conform to Gherkin

        I wish to automatically match two images to

        Generate an ISIS control network

        Background:

            Given that I have two manually identified overlapping images

            Specified in two_image_adjacency.json

        Scenario: Create an adjacency graph

            Extract image data and attribute nodes

            Then find features and descriptors

            And tag these to the graph nodes

        Scenario: Match two images

            Given a manually specified adjacency structure named two_image_adjacency.json

            When read create an adjacency graph

            Then extract image data and attribute nodes

            And find features and descriptors

            Then tag these to the graph nodes

            Then apply a FLANN matcher

            And create a C object

            Output a control network

            Then output a control network

    """

    def test_two_image(self):