initial submit
Bump 'less' gem version.

Looks like @avsej did some work to make sure the less gem supported LESS
1.3.3, use the updated version so stuff works.
move nanoc stuff to repo root

it's on its own branch, don't see why it has to be relegated to a
folder.
nanoc branch readme
don't crash when lookup_item fails
Merge branch 'nanoc'

Conflicts:
	README.md