update to 0.4.0 for cadvisor
Remove all code dealing with cadvisor Percentiles

This was removed upstream beween cadvisor 0.3.0 and 0.4.0
Don't force a host port through kubecfg
Merge pull request #1395 from thockin/kubecfg

Don't force a host port through kubecfg
Merge pull request #1396 from eparis/update-cadvisor

Update cadvisor to 0.4.0
Add an IPAllocator type
Add a flag-compatible wrapper for net.IPNet
Move ErrorList to util
Add master plumbing for ip-per-service
Add a util/exec interface for testing execs.
Add a pkg for iptables support

This makes iptables an injectable dependency.  The test for this started off
simple, but got a bit out of hand.  It's starting to become a mocking
framework.
kubcfg hack - remove me
wip - testing proxy, tests broken
Use '=' for flags or else parsing gets confused sometimes