rm function names from comments and shortened tests
renamed class Complex to Z
renamed class APLArray to A
refactored slash.coffee and backslash.coffee
made sure to use "by 1" in almost all for loops

If you don't specify a step with "by 1", CoffeeScript will generate
horrible code:
  for (i = _i = 0; 0 <= n ? _i < n : _i > n; i = 0 <= n ? ++_i : --_i) {...}

With a step it's still not perfect but tolerable:
  for (i = _i = 0; _i < n; i = _i += 1) {...}