Added a Local Definition vernacular command. This type of definition
has to be refered through its qualified name even when the module
containing it is imported.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16263 85f007b7-540e-0410-9357-904b9bb8a0f7
Documentation of the "Local Definition" command.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16264 85f007b7-540e-0410-9357-904b9bb8a0f7