snmp.AirOS v0.1

Added test_interfaces_number_crossed
 * it verifies whether the interfaces provided by SNMP is equal to the number provided by netengine get_interfaces method

Added interface_bytes + test in SNMP backend
 * for every interface returns an ordered dict with tx and rx octet (bytes)

PEP8 dict indentation cleanup in SNMP.AirOS backend

Added interface_MTU + test in SNMP.AirOS backend
 * returns an ordered dict with interfaces and their MAC address (loopback interface has no MAC address but still there)

get_interfaces() fixed in to_dict SNMP.AirOS backend
 * missing brackets

Added interfaces_to_dict + test in SNMP.AirOS backend
 * return an ordered dict with all the informations about every interface

Modification to get_iterfaces() for index
 * from 10 to 15

Removed control on empty string in interfaces_MAC
 * it skipped one or more information (interface, MAC)

Removed condition in interfaces_bytes property, now interfaces_to_dict works well

cleanup according to Landscape.io and PEP8

Some comment in SNMP.AirOS backend for cryptic operation over MAC address

Uniformation of interfaces_state to other properties' length

Fixing indentation of dict in snmp.AirOS backend

interfaces_mtu is still alive

Fix in indentation

wireless_dbm property added in snmp.AirOS backend
 * returns a list with the dbm of the link/s

Optimization of queried oid in wireless_dbm property

wireless_dbm added in to_dict SNMP AirOS

wireless_to_dict + test added in snmp.AirOS backend :)
 * returns an ordered dict with all the infos about the wireless link/s

standardization of interfaces_to_dict in snmp.AirOS

From interface to name in snmp.AirOS backend

roadmap to final interfaces_to_dict
 * + some modifications in dictionary keys