Overloads for zmqpp::message + Leosac::Auth::AccessStatus.

Move custom overload to Auth.cpp and add new overload for
a new type: Leosac::Auth::AccessStatus.
Add a function to log exceptions
fix recursive call
output cleanup
Update doorman module to use type access status
Rework Auth and AuthFile.

This commit update message passing spec (#47) and update
implementation to follow thoses.

It also provide simple (but working) auth rules using configurable
by date (groups are not available yet). This is basic implementation
of #46.