Removing sampling and percentiles from interface.

Also removing all implementations.
Merge pull request #233 from vmarmol/master

Removing sampling and percentiles from interface.
Remove remaining parts of samples and percentiles.
Remove unused file.
Merge pull request #234 from vmarmol/obs

Remove unused file
Make dynamic housekeeping flag configurable
Merge pull request #237 from vmarmol/dyn

Make dynamic housekeeping flag configurable
Merge pull request #235 from vmarmol/rm

Remove remaining parts of samples and percentiles.
Adding all dependencies to Godeps.
Merge pull request #239 from vmarmol/deps

Adding all dependencies to Godeps.
Use inotify to watch for new containers.

This reduces cAdvisor CPU usage below 1% in my CoreOS system.

We also reduce global housekeeping to every 60s as a fallback in case we
miss an event.
Remove unused filter ContainerHandlers.
Wording changes to SubcontainerEvent comments
Merge pull request #238 from vmarmol/inotify

Use inotify to watch for new containers.