Homestyx hydra

R1:ea8faedf0b9f

Add very basic 1-up HTML renderer support

Summary:
- Add a query parameter to select the diff renderer.
- When we populate diffs, use the 1-up renderer if the device isn't a desktop. Don't switch renderers once the page has loaded since it will be a tremendous mess. We can add an "always use 1-up" preference later.
- Tweak JX.Device so we avoid a race condition, where `JX.Device.getDevice()` may not be valid when other behaviors run.
- Implement enough of the 1-up HTML renderer to provide a vague…
Repository: R1 hydra
Commit Date: Jan 14 2013