Change substitute_paths() to accept hashes too
Create a /docs path and redo the front page
Merge branch 'branch/change-session-curator' into testing

Conflicts:
	root/autohandler
	root/docs/canto_introduction.mhtml
	root/local_templates/about_pombase_curation_tool.mhtml
	root/local_templates/pombase_front_page.mhtml
	root/static/css/style.css
Change new front page to use bootstrap style