osx compatibility w/ key location in orb-ns

[justinabrahms]

When you create a key on osx via orb, doesn't go to ~/.noosphere/keys.. but rather ~/Library/Application Support/network.subconscious.noosphere/keys. orb-ns does not support specifying this.

[nix-shell:~/src/github.com/subsconsiousnetwork/noosphere]$ orb key create mykey
Created key "mykey" in "/Users/abrahms/Library/Application Support/network.subconscious.noosphere/keys"
Public identity did:key:z6MkoQpArQeYhJwJXx4xV7XrWbnPDJrby8EabkE9H3rgbrZT

[nix-shell:~/src/github.com/subsconsiousnetwork/noosphere]$ ls -alh ~/.noosphere/
total 0
drwxr-xr-x   3 abrahms staff   96 Nov 29 09:57 .
drwxr-x---+ 37 abrahms staff 1.2K Nov 29 09:57 ..
drwxr-xr-x   2 abrahms staff   64 Nov 29 09:57 keys

[nix-shell:~/src/github.com/subsconsiousnetwork/noosphere]$ ls -alh ~/.noosphere/keys/
total 0
drwxr-xr-x 2 abrahms staff 64 Nov 29 09:57 .
drwxr-xr-x 3 abrahms staff 96 Nov 29 09:57 ..

[nix-shell:~/src/github.com/subsconsiousnetwork/noosphere]$ orb key list
NAME     IDENTITY
mykey    did:key:z6MkoQpArQeYhJwJXx4xV7XrWbnPDJrby8EabkE9H3rgbrZT