Add install.sh

infiles_dps/install.sh

+#!/bin/bash
+
+export SCONS_CONFIG_DIR=/home/.isce
+export PATH="/home/pkgs/isce/contrib/stack/topsStack:$PATH"
+export ISCE_INSTALL_ROOT=/home/pkgs/isce
+export PYTHONPATH=$ISCE_INSTALL_ROOT:$PYTHONPATH
+export ISCE_HOME=$ISCE_INSTALL_ROOT/isce
+export PATH=$ISCE_HOME/applications:$PATH
+
+pushd /home/pkgs/isce2
+scons install