Merge pull request #13 from brtz/master

merge back to develop
[ADD] get_iface_to_addr() to get a dict of addresses by interface
[ADD] get_priv_info() to get private (ip, interface and network-id)
[ADD] get_own_srvid() to get the srvid of the current machine
[CHANGE] get() to use own srvid as resourceid if it is set to "self"
Merge pull request #14 from brtz/develop

move code from inventory_this into __init__.py