Add support for APS-format packaging

The Aapplication Packaging Standard (APS, http://doc.apsstandard.org/) is an established packaging format already quite widely used (Parallels Automation being a big example). Its feature set is quite similar to Murano's, at least at first and second glance, and its roles are very similar.

The model behind APS is that an application is packaged in a standard format, and hosted by an APS controller that supports known API endpoints for retrieving packages, type information etc (quite similar to what Murano does now). Applications in turn must support an API that allows the controller to perform a set of operations (update being one, lifecycle operations etc).

While this is very similar to Murano right now, it would likely ease transition, especially since there is a huge existing catalog of APS-packaged applications at http://dev.apsstandard.org/apps/.

HP has some interest in this (as well as TOSCA); it would be worth investigating what support there would be for this since it is likely a large development effort.