cloudmonkey: on error monkeyprint to stderr

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>
cloudmonkey: autocompletion for set/option values

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>
requester: write to standard err if API fails

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>