* module/ice-9/threads.scm: Move syntax definitions before the procedures
that use them, and rewrite as hygienic macros since they are so much
nicer that way. Fixes the thread tests.
Moved ice-9/ and oop/ under module/, with the idea being that we have
only scheme under module/. Adjusted configure.in and Makefile.am
appropriately. Put oop/ at the end of the compilation order.