Refs #205. Merge boegel's codes about downloading LAPACK.

diff --cc Makefile
index 7424dd6,9992d0b..2668ab3
--- 1/Makefile
--- 2/Makefile
+++ b/Makefile
@@@ -263,16 -260,18 +263,18 @@@ LAPACK_URL=http://www.netlib.org/lapack
  
  lapack-3.4.2.tgz :
  ifndef NOFORTRAN
+       if [ ! -a $< ]; then
  #http://stackoverflow.com/questions/7656425/makefile-ifeq-logical-or
  ifeq ($(OSNAME), $(filter $(OSNAME),Darwin NetBSD))
-       curl -O $(LAPACK_URL)
+       curl -O $(LAPACK_URL);
  else
  ifeq ($(OSNAME), FreeBSD)
-       fetch $(LAPACK_URL)
+       fetch $(LAPACK_URL);
  else
-       wget -O $@ $(LAPACK_URL)
 -      wget $(LAPACK_URL);
++      wget -O $@ $(LAPACK_URL);
  endif
  endif
+       fi
  endif
  
  large.tgz :