Remove passing mode.

[jesse019]

Code should be able to determine if the mode is test or baseline by checking if images or test_folder is available in the baseline directory. If during comparison baseline image doesn't exist. Actual image should automatically be moved to baseline.

Replacing existing baseline images with actual can be done by using the eyes server.

An optional argument called images could be added to allow saving images in a location specified by the user. Location could be default results directory if images directory is not provided by the user.