added git version string access in the code

get_git_version

@@ -0,0 +1,14 @@
+#!/bin/csh -f
+cat <<!
+#include "version.h"
+const char LA::version[] = 
+!
+echo -n '"'
+echo -n `git describe`
+echo -n ' HEAD commit = '
+set head=`git rev-parse HEAD`
+echo -n $head
+echo -n ' dated '
+echo -n `git show -s --format=%ci $head`
+echo -n '"'
+echo ';'