Establish a "hierarchy" in the datastore with multiple keys

[gudnuf]

Currently, when creating prisms we create them with one key which makes it so that we have to list all items in the datastore to find one single prism.

From the docs:

"key is an array of values (though a single value is treated as a
one-element array), to form a hierarchy. Using the first element of
the key as the plugin name (e.g. [ "summary" ]) is recommended."

This makes we think the prism's do not need to be name paced with "prism" instead something like datastore([prism, prismId]) could be used to create

[gudnuf]

resolved with commit 14c6be6