Add route viewer tab
Modified:   app/views/plans/tabs/_route_viewer.html.haml
Create Button
Modified:   app/views/plans/tabs/_map.html.haml
Change map-canvas size
Modified:   app/assets/javascripts/plans.js

Create event handler
Implement route viewer
Improve algorithm
Merge branch 'master' into route_viewer_beta

Conflicts:
	app/views/plans/tabs/_map.html.haml
implement route viewer
Merge branch 'route_viewer_beta'