Don't assume every AWS VPC has tags

The default VPC has no tags (by default), so we should use get()
Default ENABLE_CLUSTER_MONITORING to false

Otherwise kube-down fails because the variable is not defined
Use apiserver instead of etcd for kube-proxy.

For cloud-providers that use salt, have kube-proxy use
apiserver instead of etcd as a config source.
Move watch filter into storage level
Implement apiserver communication for Vagrant

This implementation is based on the GCE impementation from
618a367dbb48dbaa9c3b50e877858d854322fd0b.
- make cadvisor port configurable on the kubelet.
- added cadvisor port documentation.
Add functions to get kubelet directories.

Gets rid of some magic constants and makes volume plugins (coming later)
cleaner.
Add a strongly typed error for unrecognized kind/type/version
Use if err := ; err != nil instead of two lines
Shrink runtime.TypeMeta to be equivalent to api TypeMeta

Remove unused fuzzing
Added two test cases for KubeletClient
Add python-cherrypy as explicit install for salt-api
Update roadmap based on discussion at contributor meetup.
Run e2e tests in deterministic random order

Currently, we run the e2e tests in whatever order readdir happens to
return, which is random on some filesystems, name sorted on others,
create order on others, etc. Eventually, we may want to be
automatically hermetic between e2e tests (especially as we introduce
more resource destructive tests), but until then, it would be useful
if we permute the test order randomly between runs to ensure that
developers don't accidentally rely on a particular order. This
introduces a form of forced hermeticism, since improper state cleanup
from one test may not perturb a given test, but there's probably *a*
test in the suite that the order will perturb, so the RNG will find
that order eventually.

Adds logging of the generated seed, and an --orderseed argument that
can be used to re-run in the same order. Also sorts the pass/fail list
now for easier human reading.
Merge pull request #2782 from zmerlynn/e2e.shuffle

Run e2e tests in deterministic random order
Merge pull request #2667 from thockin/klet-dirs

Kubelet directory-name builder funcs
Scheduler changes for extensibility
Scheduler changes to allow multiple priority functions
Fixing gofmt errors
Combining scheduler priority functions using weighted averages