Allow for a region to always be visible.
Renamed hook from responseAlter to response.
Changed variable name from alwaysVisible to alwaysRender, to avoid confusion.
Added alwaysRender field to the regions.
Merge branch 'fs/response-alter' into fs/empty-regions
Merge branch 'fs/response-alter' into taller
Merge branch 'fs/empty-regions' into taller

Conflicts:
	applications/default/extensions/panel/panel.js
Fixed wrong validation of alwaysRender option.
Merge branch 'fs/empty-regions' into taller