Merge pull request #48 from stgraber/master

rest-spec: Add start, stop, restart and rename
Add a note about creating sub{u,g}ids in README.md

Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>
rest-api: update to clarify access/input/output

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
rest-api: Add operation wait

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
rest-api: Add profiles API

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>