added information about the naming conventions in schema.py
also:
* some typo fix
* note about ObjectRelation soon being deprecated
* clarified a few hazy points
#! /bin/sh -e#if [ "$1" = remove -o "$1" = upgrade ]; then if which install-docs >/dev/null 2>&1; then install-docs -r cubicweb-doc fifi#DEBHELPER#exit 0