For some reason EM_POSFROMCHAR was returning 0 when the position was
equal to the end of the text, or beyond the end of the text. Instead
it should use the position at the end of the text for both these
cases.  The x value was also seen to be offset by 1 according to the
tests.

Add tests for EM_POSFROMCHAR for 1.0 and 2.0.

richedit: Implement rule that in 1.0 emulation, a single CR that terminates the text is NOT a line break.

Fix riched32 test that now succeed.

Document remaining uses of bEmulateVersion10 and other checks for CRLF in editor.c.
Make RTF reader emit a \r or a \r\n according to emulation, not a \n, which breaks streaming tests.
Remove todo_wine from a bunch of riched32 tests that now succeed.

richedit: Remove indication for bCRLF, now that ME_GetTextW() knows how to honor CR and LF counters.

EM_GETTEXTRANGE and EM_GETSELTEXT are affected by this, so include tests to ensure no behavior was broken.

Add fixup to ME_FindItemAtOffset(), fixes crash by null-pointer access.
Add tests for EM_LINELENGTH.

Add richedit 1.0 tests for EM_GETLINE.

Text streamout now honors CR and LF counters.
Tests to pin down required EM_STREAMOUT behavior.

riched32: Implement a portion of suggested interpretation of CRLF handling for richedit 1.0 emulation.

Fixes a few todos introduced by previous patch.

Prefix other entries with '/' to make them non-recursive.