Implement a mini-ffi to get Win32API working again.
Fixes #1153.  Dir[] should accept zero arguments
Merge it forward son
Fixes #1154. Pathname.new(Dir.new('dir_name')) raises a TypeError (Dir missing to_path)
Merged 1.7 and then tweaked to make to_path be a proper alias to path since it is in 1.9+
[IR] Stubs for JIT-ting blocks.

* Not sure if this is helpful, but thought I'll give it a gentle
  push so charlie can take it forward.
Fix test_load.rb

This was recently enabled in 4b6dfbc, probably accidentally.  Happy
accident though: it's working in 1.9 now once we re-add the
requireTest-1.0.jar, so that's one less FIXME.
Remove failing ffi-dependent test

With ffi being removed in 1ca75b2, this test is no longer valid.