[NETCONF] Try Netopeer ( NETCONF tools )

Netopeer is a set of NETCONF tools built on the libnetconf library. 

It has single level server, multiple level server, and cli to use. 
Basically I think if we don't try, we won't truly understand what NETCONF/YANG look like and how it works. During the compilation and setup, I encounter some problems, but I find the following information that save me a lot of time to do trouble shooting.

Here is a URL about how to setup Netopeer server and to use it with cli.
http://seguesoft.com/how-to-set-up-netopeer-server-to-use-with-netconfc

This URL provides a lot of YANG Modules and examples to refer:
http://www.netconfcentral.org/