Remove pictograms for now
Added word 'phase' to page titles
Add subtitles to phases pages
Make breadcrumb more explicit
Share phases list across home page and phases index page
Create phase 'tube-line' effect in CSS

Allows for indefinitely long tube lines. Needs a little work.
Refine phase line styles
Include breadcrumbs on phases layout
Add guidance links for relevant phase

Also change "class" to "phase" in front matter as it's used for more than just the class.
Sort phase links by category
Remove extraneous category
Inform if no guidance is available for phase
Split out browse links into include
Transpose phase link headings down
Delete commented phases css
phase navigation wip
Linkify phases headings
Merge branch 'master' into phases

Conflicts:
	service-manual/browse/index.md
Merge branch 'phases'