Improve command help

git-svn-id: http://scmcit.gva.es/svn/gvnix/trunk/code@2270 69435866-3869-0410-973d-9f951a852354
Improve commands help

git-svn-id: http://scmcit.gva.es/svn/gvnix/trunk/code@2271 69435866-3869-0410-973d-9f951a852354