Lapack Blas fix for cygwin

Lapack doesn't compile properly with gcc4 on cygwin. We added an option, so when you compile it gives you an option to link with the precompiled cygwin versions of BLAS and LAPACK. If you have upgraded to the last version of Fastlib, remove the lock files from the fastlib/la directory. Also make sure you have installed the lapack module with the cygwin installer. Next time you build fastlib it will prompt you about blas lapack. Just choose version 3 if you are working unde cygwin