Knockout view model overhaul

* Config panel now obsolete. Just add a URL with a polling frequency at top of page and also remove a job by simply closing it.
* Give each build it's own configurable polling refresh rate.
* Improve Polling errors. Have each build continue to poll for info regardless of ajax result.
* Improved console logging to reduce url noise

**NOTE: This will break the current page. All of the builds will need to be re-defined.**