Changed en dash to hyphen.

In the future, I will probably convert all date-range hyphens to en dashes.
However, I will keep them as hyphens for now, to preserve consistency.
Added entry for Mohism.
Added entities for Neoism, Yangism, and Mohism.
Adds a new line between entity declarations, to make debugging easier.
Added newlines to entity declarations, per commit be17947f03.
Fixed term ID.