Start dynamic layers work in branch
Merge branch 'master' into dynamic-layers
Merge branch 'master' into dynamic-layers
Fix tests, finish work here. Needs a design hit.
Update make for tests
Remove more unreliable or slow layers, select the right layer initially,

fix null tooltips
Fix sourcetag regression
Merge branch 'master' into dynamic-layers

Conflicts:
	js/id/renderer/background_source.js
	js/id/ui/layerswitcher.js
Merge pull request #665 from systemed/dynamic-layers

Dynamic layers