Switch panel order.
Use reader controller from Lens repo.
We are on master.
Merge branch 'master' of https://github.com/elifesciences/lens

Conflicts:
	src/lens_controller.js
Merge branch 'master' of https://github.com/elifesciences/lens
Fix regression.
Merge branch 'master' into lens_next

Conflicts:
	src/panel_specification.js