Allow for more flexible action discovery

[davidferlay]

Current

• Actions are discovered based on path syntax like */actions/action-name which result in action id *:action-name

Expected

• It would be great to allow also actions/action-name which would result in action id action-name

[davidferlay]

Follow-up: Looks like actions located in directory root are not listed in webUI /flow page

Create an issue there -> launchrctl/web#124