Script to change directory in project added

src/exp/com/src/os_linux/pwrp_chd.sh

+#!/bin/bash
+#
+# Proview   Open Source Process Control.
+# Copyright (C) 2005-2015 SSAB EMEA AB.
+#
+# This file is part of Proview.
+#
+# This program is free software; you can redistribute it and/or 
+# modify it under the terms of the GNU General Public License as 
+# published by the Free Software Foundation, either version 2 of 
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful 
+# but WITHOUT ANY WARRANTY; without even the implied warranty of 
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License 
+# along with Proview. If not, see <http://www.gnu.org/licenses/>
+#
+# Linking Proview statically or dynamically with other modules is
+# making a combined work based on Proview. Thus, the terms and 
+# conditions of the GNU General Public License cover the whole 
+# combination.
+#
+# In addition, as a special exception, the copyright holders of
+# Proview give you permission to, from the build function in the
+# Proview Configurator, combine Proview with modules generated by the
+# Proview PLC Editor to a PLC program, regardless of the license
+# terms of these modules. You may copy and distribute the resulting
+# combined work under the terms of your choice, provided that every 
+# copy of the combined work is accompanied by a complete copy of 
+# the source code of Proview (the version used to produce the 
+# combined work), being distributed under the terms of the GNU 
+# General Public License plus this exception.
+#
+#
+# Short command to change to a project directory
+#
+var=pwrp_$1
+dir=${!var}
+if [ -z $dir ]; then
+  echo "No such variable \$$var"
+else
+  if [ ! -e $dir ]; then
+    echo "No such directory $dir"
+  else
+    cd $dir
+  fi
+fi