Change the default Pull policy to PullIfNotPresent.
Remove todos about addin usage to Pods.

Usage in Pods would be quite noisy when watching pods.
People should get usage from heapster, or from
some other object TBD.
Merge pull request #2360 from dchen1107/cleanup

Change the default Pull policy to PullIfNotPresent.
make-cert.sh: Create directory before writing cert

Adds a "mkdir -p" to the make-cert.sh.  This fixes an issue where the
script could fail if /srv/kubernetes did not exist previously.
Merge pull request #2364 from rlarocque2/mkdir_fix

make-cert.sh: Create directory before writing cert
Merge pull request #2366 from lavalamp/fix3

e2e + kubectl improvements
Merge pull request #2362 from erictune/nousage

Remove todos about adding usage to Pods.
Simplify kubectl describe code
fix up event client for namespaces
Fix server-side namespace handling for events; add validation