Acting on a group of endpoints

[davaya]

Based on 6/8 working meeting, I removed named_group from the actuator specifiers table and from examples A.1.3 and A.2.1. This means that the examples are syntactically correct, but they no longer perform the described function of acting on a group of endpoints.

The examples should be deleted, or replaced by tables and examples that show a single "manager Consumer" acting on a group of endpoints using targets or args instead of actuator specifiers.

The language spec should note that any Message can always be addressed to a group of endpoint Consumers. Profiles can mention that use case and solution without defining any example commands (message body) or by having the examples show a full message with headers and body.

[davaya]

Closed as redundant, covered by Issue #31