[schema] React to yams improvement of metadata attribute handling.
* Change the way RichString is deprecated.
* Add documentation about metadata attribute
CubicWeb semantic web framework===============================CubicWeb is a entities / relations based knowledge management systemdevelopped at Logilab.This package contains:- a repository server- a RQL command line client to the repository- an adaptative modpython interface to the server- a bunch of other management toolsInstall-------More details at http://docs.cubicweb.org/admin/setupGetting started---------------Execute:: apt-get install cubicweb cubicweb-dev cubicweb-blog cubicweb-ctl create blog myblog cubicweb-ctl start -D myblog sensible-browser http://localhost:8080/Details at http://docs.cubicweb.org/tutorials/base/blog-in-five-minutesDocumentation-------------Look in the doc/ subdirectory or read http://docs.cubicweb.org/