Simplified the instructions by de-duplicating the 32/64-bit instructions
now that every port is available for both architectures.
Removed out-of-date Cygwin information.
Included details on the new FlexDLL bootstrapping procedure.
Cygwin is a flavour of Unix. Coupled with the fact that it is built
using the normal Unix configure route, it adds to the confusion of the
Windows ports (especially the fact that the four native ports need a
Cygwin environment to be compiled) including its instructions in the
native port.
Various out-of-date instructions also removed: Cygwin hasn't provided
GCC 4.5.3 for a long time and FlexDLL can be recompiled from sources
without alteration since version 0.32.
Damien Doligez
David Allsopp
Jonathan Protzenko
Simon Cruanes