Update simplified content models in /tmp

[greenTara]

The directory should be renamed (e.g. simp).
Once the default values of attribute values are removed, bring this up-to-date so the modifications can be verified.

Ideally, this would be kept up-to-date by a commit hook.

[greenTara]

I think the directory containing the content models should be named /content-models .
I can't think of a single word that really captures the concept, and the hyphenation is consistent with other directories, such as reaction-ruleml .