General structure for new doc system
Merge remote-tracking branch 'origin/master' into docRefactor

Conflicts:
	app/views/projects/index.html.erb
Refactor: changed name from help to doc
Created redirection for old pages
Improve help style
Some more doc
Added video support
Reverting last commit for register file
fixes #118 
Logo is displayed properly
fixes #121 

More clear explanation when no projects match criteria
Working on #120. NeuroLexIds badge and links to external webs. Basic
infrastructure.
fixes #120 
Better layout
Improved exception management
fixes #120