Problem: zproto server code logging is surprising

All other actors are using a command VERBOSE to enable logging;
the actor generated from zproto_server.gsl is using animation on
its state machine. This is surprising to external users, which
is not good.

Solution: use VERBOSE command and hide the fact that the server
has a state machine. Note: breaks the server config file, so
server/animate -> server/verbose.
Problem: VERBOSE command isn't working

Server pulls server/verbose from config tree and finds it empty.
Solution: fix VERBOSE command.
Merge pull request #109 from hintjens/master

Hid animation semantics from API