document and install darshan-diff

git-svn-id: https://svn.mcs.anl.gov/repos/darshan/trunk@22 3b7491f3-a168-0410-bf4b-c445ed680a29

INSTALL

@@ -60,6 +60,9 @@ a binary format with native gzip compression.  To get a human
 readable version of the log file, use the "$PREFIX/bin/darshan-parser
 $LOGPATH/<log_file_name>" utility from the bin directory.
 
+You can also compare two different log files by using
+$PREFIX/bin/darshan-diff <log1> <log2> to see what fields are different.
+
 To generate some automatic graphs, go to the "utils" directory of the
 source tree and run "./darshan-aggregate-stats.pl" on a text file that
 contains the output from darshan-parser.  That perl script will generate

Makefile.in

@@ -67,6 +67,7 @@ install:: all
 	install -m 755 lib/libdarshan-mpi-io.a $(libdir)
 	install -d $(bindir)
 	install -m 755 darshan-parser $(bindir)
+	install -m 755 darshan-diff $(bindir)
 	install -m 755 darshan-mk-log-dirs.pl $(bindir)
 	install -m 755 compilers/mpicc-trace-bgp $(bindir)/mpicc
 	install -m 755 compilers/mpicxx-trace-bgp $(bindir)/mpicxx