Integrate network latency

[stsievert]

It'd be nice to have the latency for different networks to see how much that influences the results. Currently, the network object only looks at bandwidth:

paleo/paleo/device.py

Lines 38 to 54 in 984bbf5

	class Network(object):
	def __init__(self, name, bandwidth):
	"""
	Args:
	name: name of this network connection.
	bandwidth: in Gbps.
	"""
	self._name = name
	self._bandwidth_Gbps = bandwidth
	@property
	def name(self):
	return self._name
	@property
	def bandwidth(self):
	return self._bandwidth_Gbps