Code review comment for lp:~paulliu/unity-scope-click/showratings

Currently I add a TODO in source.
I've talked to lool and noodles. Found that the system can also provides more than 1 framework on a single device.

To get a list of the framework that system is provided, there's some files in /usr/share/click/frameworks/*.framework provided by package "ubuntu-sdk-libs". Also there's a python class ClickInstaller._has_framework() can do this.

So we might want to do an intersect of the system's and the AppDetails' and do a multiple query and then sort the result.