Remove remaining parts of samples and percentiles.
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.
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