sunpy/sunpy — pull request #1150 by derdon (2014-08-24 17:37:59+00:00)
Title: internal database package refactor

I added a new class ``CompositeOperation`` so that from the user's point of view the ``__call__`` of a sequence of operation works the same as just one operation. Nothing will change for the average user of SunPy, it's mainly a refactor to improve maintainability and code style in general.