Replace NR routines for LU decomposition by lapack calls

Add LU decomposition from LAPACK 3.71

lib/liblapack.a

@@ -0,0 +1 @@
+../bin/liblapack.a

local/LICENSES/LAPACK

@@ -0,0 +1,48 @@
+Copyright (c) 1992-2013 The University of Tennessee and The University
+                        of Tennessee Research Foundation.  All rights
+                        reserved.
+Copyright (c) 2000-2013 The University of California Berkeley. All
+                        rights reserved.
+Copyright (c) 2006-2013 The University of Colorado Denver.  All rights
+                        reserved.
+
+$COPYRIGHT$
+
+Additional copyrights may follow
+
+$HEADER$
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+- Redistributions of source code must retain the above copyright
+  notice, this list of conditions and the following disclaimer.
+
+- Redistributions in binary form must reproduce the above copyright
+  notice, this list of conditions and the following disclaimer listed
+  in this license in the documentation and/or other materials
+  provided with the distribution.
+
+- Neither the name of the copyright holders nor the names of its
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+The copyright holders provide no reassurances that the source code
+provided does not infringe any patent, copyright, or any other
+intellectual property rights of third parties.  The copyright holders
+disclaim any liability to any recipient for claims brought against
+recipient by any third party for infringement of that parties
+intellectual property rights.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

local/LICENSES/README

@@ -6,4 +6,4 @@ to third-party sources in the IRAF system:
     OpenSolaris_License-CDDL.pdf	For the XYACC parser (boot$xyacc)
     UCAR				For NCAR graphics
     ERFA				For ast_julday_to_date in noao$astutil/asttools/asttimes.x
-
+    LAPACK				For math$lapack

math/lapack/README

@@ -0,0 +1,22 @@
+This directory contains a small subset  of the LAPACK source files for
+the use in IRAF.
+
+LAPACK is a library of Fortran subroutines for solving the most commonly
+occurring problems in numerical linear algebra.
+
+LAPACK is a freely-available software package. It can be included in commercial
+software packages (and has been). We only ask that that proper credit be given
+to the authors, for example by citing the LAPACK Users' Guide. The license used
+for the software is the modified BSD license, see:
+https://github.com/Reference-LAPACK/lapack/blob/master/LICENSE
+
+Like all software, it is copyrighted. It is not trademarked, but we do ask the
+following: if you modify the source for these routines we ask that you change
+the name of the routine and comment the changes made to the original.
+
+LAPACK is available from github at:
+https://github.com/reference-lapack/lapack
+
+LAPACK releases are also available on netlib at:
+http://www.netlib.org/lapack/
+