controller/examples: Update TODOs

Signed-off-by: Jesse Stuart <jesse@jessestuart.ca>
controller/examples: WIP

Signed-off-by: Jesse Stuart <jesse@jessestuart.ca>
controller/examples: WIP

Signed-off-by: Jesse Stuart <jesse@jessestuart.ca>
controller/client: Add UpdateApp method

Signed-off-by: Jesse Stuart <jesse@jessestuart.ca>
controller/examples: Fix update app example

Signed-off-by: Jesse Stuart <jesse@jessestuart.ca>