Looks like providing a service id isn't working, so it the help
message was reduced to just type and name.
Added a bit more to the docs, too.
Change-Id: Id7f8b48bdf99773ad55ca7f204f3c779f84633d5
try and add some consistency with the show and delete commands.
replace 'show x' with 'display x'
change 'delete a y' with just 'delete y'
Change-Id: I47dfa8ee23ac5c41b355796415eb515155832f65
