an i586/i686 optimized Twofish implementation for Linux

These sources are experimental. Make sure you don't depend on it's functionality, or the case of malfunction is not a problem for you.

Changes: 0.2 removes .cia_iv_size for 2.6.0-test4

News: I have been working on a port to gas, which is ATM far from being complete (although it works), but due to a sustained lack of time caused by my studies I have suspended the work. Sorry folks.