imported a reworked version of BTL (Benchmark for Templated Libraries).

the modifications to initial code follow:
* changed build system from plain makefiles to cmake
* added eigen2 (4 versions: vec/novec and fixed/dynamic), GMM++, MTL4 interfaces
* added "transposed matrix * vector" product action
* updated blitz interface to use condensed products instead of hand coded loops
* removed some deprecated interfaces
* changed default storage order to column major for all libraries
* new generic bench timer strategy which is supposed to be more accurate
* various code clean-up

bench/btl/data/mk_mean_script.sh

@@ -0,0 +1,39 @@
+#! /bin/bash
+WHAT=$1
+DIR=$2
+MINIC=$3
+MAXIC=$4
+MINOC=$5
+MAXOC=$6
+
+WORK_DIR=tmp
+mkdir $WORK_DIR
+
+DATA_FILE=`find $DIR -name "*.dat" | grep _${WHAT}`
+echo 
+for FILE in $DATA_FILE
+do
+        ##echo hello world
+        ##echo "mk_mean_script1" ${FILE}
+	BASE=${FILE##*/} ; BASE=${FILE##*/} ; AVANT=bench_${WHAT}_ ; REDUC=${BASE##*$AVANT} ; TITLE=${REDUC%.dat}
+
+	##echo "mk_mean_script1" ${TITLE}
+	cp $FILE ${WORK_DIR}/${TITLE}
+	
+done
+
+cd $WORK_DIR
+../main $1 $3 $4 $5 $6 *
+../mk_new_gnuplot.sh $1 $2
+rm -f *.gnuplot
+cd ..
+
+rm -R $WORK_DIR
+
+
+
+
+
+
+
+