[sac-dev] make and configure

[Brian Savage]

After a bit of talk about allowing the makefiles to be more portable, I 
tried my hand at moving the codebase to a configure script.  This uses 
the autoconf and automake tools available on most systems.  I was 
sucessful in building sac and running it.  The conversion allows sac to 
be built much faster than the curent makefiles plus we do away with the 
setting of enviornment variables.  Building should be as easy as
% ./configure
% make
% make install

I would appreciated some feedback on this, however the change requires 
the addition of multiple files and renaming the current makefiles.  If 
you would like to try this out please send me an email.

This does not change the source code but does change the way sac is built.

Cheers,
Brian