Update slurm build instructions

BUILD.NOTES

+This information is meant primarily for the Slurm developers. 
+System administrators should read the instructions at
+http://www.llnl.gov/linux/slurm/quickstart_admin.html
+(also found in the file doc/html/quickstart_admin.shtml).
+The "INSTALL" file contains generic Linux build instructions.
+
 Simple build/install on Linux:
-  ./autogen.sh
   ./configure --enable-debug \
               --prefix=<install-dir> --sysconfdir=<config-dir>
   make
   make install
 
-If you make changes to Makefile.am files, then on _MCR_, run
+If you make changes to any auxdir/* or Makefile.am file, then run
+_snowflake_ (where there are recent versions of autoconf, automake 
+and libtool installed):
  ./autogen.sh
 then check-in the new Makefile.am and Makefile.in files
 

INSTALL

@@ -7,7 +7,10 @@ unlimited permission to copy, distribute and modify it.
 Basic Installation
 ==================
 
-   These are generic installation instructions.
+   These are generic Linux installation instructions. Build instructions 
+specific to SLURM are available at 
+http://www.llnl.gov/linux/slurm/quickstart_admin.html
+(also found in the file doc/html/quickstart_admin.shtml).
 
    The `configure' shell script attempts to guess correct values for
 various system-dependent variables used during compilation.  It uses
@@ -36,7 +39,7 @@ may remove or edit it.
 `configure.ac' if you want to change it or regenerate `configure' using
 a newer version of `autoconf'.
 
-The simplest way to compile this package is:
+The simplest way to build and install this package is:
 
   1. `cd' to the directory containing the package's source code and type
      `./configure' to configure the package for your system.  If you're
@@ -64,6 +67,11 @@ The simplest way to compile this package is:
      all sorts of other programs in order to regenerate files that came
      with the distribution.
 
+Alternate build and installation instructions for systems supporting RPM:
+
+  1. rpmbuild -ta slurm.*.tar.bz2
+  2. rpm --install <the appropriate RPM files>
+
 Compilers and Options
 =====================