Use scrim to provide cli navigation functionality.

[danbradham]

Right now there is no way to navigate to fsfs Entries via the cli. Ideally users would be able to do the following from the cli.

$ fsfs push my_project
$ fsfs pop

Here we'd use push to change directories to the path of an Entry named my_project, then pop to navigate back to the previous location.

We can use scrim to provide a wrapper around the python cli allowing users to navigate to fsfs search results via the cli. The only downside to using scrim is that linux and mac osx users would have to source a new fsfs bash wrapper script to get access to the navigation commands. That's not a new phenomenon though.