RFC: Adding tests for windowless richedit services

[Austin Lund]

This also passes the tests under the native riched20.dll version 5.30.23.1221.

2008/6/29 Austin Lund <austin.lund at gmail.com>:
> I've sent versions of this to wine-patches in the past.
>
> In this version, I've stripped out most of the tests except those for
> the initial creation of the ITextServices object.
>
> All tests in this patch succeed under wine currently.
>