Fix 98SE: fix `SignalObjectAndWait` check

This function is half-available on 98SE (but doesn't exist on 95). According to MSDN it is only supposed to be available on NT4 and up, so adding an NT check.

That's what I get for not testing every single version every time :)

Reimplement Win32 APIs for `GetFileInformationByHandleEx` and `SetFil…

…eInformationByHandle`

Reimplement them on-top of native NT APIs as done in `fileextd.lib`.
This allows more file system APIs to work on XP and below.

Affected APIs:
- File truncation (can now set end of file without multiple SetFilePointerEx calls on NT)
- Cleaner fallback impl for reparse tags
- remove_dir_all: Modern impl now supported on all NT-based systems

Reimplement Win32 APIs for `GetFileInformationByHandleEx` and `SetFil…

…eInformationByHandle`

Reimplement them on-top of native NT APIs as done in `fileextd.lib`.
This allows more file system APIs to work on XP and below.

Affected APIs:
- File truncation (can now set end of file without multiple SetFilePointerEx calls on NT)
- Cleaner fallback impl for reparse tags
- remove_dir_all: Modern impl now supported on all NT-based systems

Reimplement Win32 APIs for `GetFileInformationByHandleEx` and `SetFil…

…eInformationByHandle`

Reimplement them on-top of native NT APIs as done in `fileextd.lib`.
This allows more file system APIs to work on XP and below.

Affected APIs:
- File truncation (can now set end of file without multiple SetFilePointerEx calls on NT)
- Cleaner fallback impl for reparse tags
- remove_dir_all: Modern impl now supported on all NT-based systems

Switch to `rtabort!` for unimeplemented/unused fallbacks

Add example config.toml

Ship src with rust9x

Fixes #20.

Only use `WC_ERR_INVALID_CHARS` on NT, fall back to `0` flags on inco…

…mpatible versions of Windows

Fixes #18

Add regular `pc` target so that build scripts can run

Ignore mismatched lengths when writing to console on non-Unicode Wind…

…ows.

Fixes #13 (more of a workaround)