Add a way to visualize analyses linked with astudy

[antgonza]

Brought by @hollylutz in the qiita.help.

It would be really good to have a list of analyses used in a given study. I think having a way to visualize all for a study and a list per preparation will be really useful.

The easiest is to create an analysis list, like the main one, but limited per study/preparation; however, open to other suggestions. Now, IMOO the visualization of this list should be limited to who has access to the study: in other words, if public, the list should be public; if only X user have access, then the list should only be seen by X.