[patch] beginnings of the macro rewrite

[Jeffrey A Law]

  In message < 20000421101846.A10427@wolery.cumb.org >you write:
  > This patch changes the #define logic to make use of token lists
  > briefly.  We convert back to the old structure, but we already get
  > significant benefits - simpler code, fewer reallocations, etc.
  > 
  > IMPORTANT: This drops support for traditional macros.  I will put it
  > back if people complain loudly enough.  If no one cares then I will
  > probably drop -traditional entirely, sometime next week.
  > -Wtraditional still works.
Please do not drop -traditional.

In general, if you find yourself wanting to remove a feature, then you're
doing something wrong.
jeff