Added in methods to properly request the "get time", "get info" and "get version" packets.
Updated LIFXBulb to store a datetime instances for the time property
Added sample scripts to test the "get time", "get info" and "get version" methods. It seems that the time returned in both "get time" and "get info" is identical.
Removed unnecessary datetime import
Updated lifx.py to properly handle the get\set bulb label calls
Added sample script to test the bulb label set\get methods by rot13'ing the labels
Merge branch 'bulb-labels'

Conflicts:
	lifx/lifx.py
	lifx/lifxconstants.py
	lifx/packetcodec.py
Merge branch 'master' into argparse to bring things up-to-date

Conflicts:
	lifx/lifxconstants.py