Add PYTHONPATH (may not be accurate on all configuration)

developer_tools/update_bash_profile.sh

@@ -37,6 +37,7 @@ else
 	    echo "#Definitions for blaar (http://blaar.org)"
 		echo "export BLAAR_DIR=$PWD"
 		echo 'export PATH=$PATH:$BLAAR_DIR/bin:$BLAAR_DIR/scripts'
+		echo 'export PYTHONPATH=$PYTHONPATH:/usr/local/lib/bl_python/'
 		echo 
 	} >> $FILE
 	echo