Updated CW tutorial.
* Summarized the list of steps to create a new cube.
* Added a subsection on writing entities.
* Added a subsection on modifying the schema and updating the corresponding instance.
#! /bin/sh -e
#
if [ "$1" = remove -o "$1" = upgrade ]; then
if which install-docs >/dev/null 2>&1; then
install-docs -r cubicweb-doc
fi
fi
#DEBHELPER#
exit 0