add new utility for creating svn tag

sbin/dm_svn_tag.sh

+#!/bin/sh
+
+SVN_ROOT=https://subversion.xray.aps.anl.gov/DataManagement
+version=$1
+if [ -z $version ]; then
+    echo "Usage: $0 <version>"
+    exit 1
+fi
+svn copy $SVN_ROOT/trunk $SVN_ROOT/tags/$version -m "Creating tag $version"
+