Add an ability to fetch history from Zabbix (HAP Zabbix only)

Add an ability to fetch history from Zabbix.
Only HAP Zabbix plugin supports it at this time.
ArmZabbix and others doesn't support it yet.
I may implement it to others later but I don't give priority to it now.

REST API for it is also added.

The suffix of the class name: 0 or 1 is the number of argument of operator(), isn't it ?
Some other libraries also use that rule. I think the rule is not the best, but better and practical.
Does nobody know the best way in the world ? 

Anyway, you don't have to do something (use the this code).