Bookdata enhancements (see :DOC bookdata)

git-svn-id: http://acl2-devel.googlecode.com/svn/trunk@1122 5d84a466-a78b-0930-a311-59b22171a541
Oops; fixed typo in bookdata :doc update

git-svn-id: http://acl2-devel.googlecode.com/svn/trunk@1123 5d84a466-a78b-0930-a311-59b22171a541