Add README for Windows CE.

README.wince

@@ -0,0 +1,81 @@
+DBus Daemon for Windows CE/Windows Mobile 6.5
+=============================================
+
+Bugs in upstream for any window version:
+* MoveFileExA < 0 result check bug
+* double dbus_free somewhere I forgot where (check in -ugly)
+* alignment issue
+* CreateProcess process information handle leak
+* _dbus_getsid NULL vs INVALID_HANDLE_VALUE
+* win_account_to_sid
+
+Customisation
+=============
+
+1) At installation, the following registry value should be set to the
+installation directory of the dbus installation (the directory
+containing the bin, etc, share folders):
+
+HKLM\Software\freedesktop\DBus\Install Directory
+
+2) Instead of environment variable DBUS_VERBOSE, use
+HKLM\Software\freedesktop\DBus\Verbose
+
+2) The keyring directory is MYDOCUMENTS\dbus-keyrings, not
+HOMEPATH\.dbus-keyrings.
+
+
+Compilation
+===========
+
+./configure --host=arm-mingw32ce CPPFLAGS=-I/path/to/expat/include LDFLAGS=-L/path/to/expat/lib
+
+A recent version of libtool is required, with this change:
+
+2010-02-28  Pierre Ossman  <ossman@ossman.lkpg.cendio.se>  (tiny change)
+            Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
+
+       Fix deplibs check fallback for 64-bit Windows and Windows CE.
+       * libltdl/m4/libtool.m4 (_LT_CHECK_MAGIC_METHOD): Accept file formats
+       'pe-arm-wince' and 'pe-x86-64'.  Add note about consistency with ...
+       * libltdl/config/ltmain.m4sh (func_win32_libid): ... the respective
+       pattern here; sync pattern from the former.
+       * tests/deplibs-mingw.at (deplibs without file command): New
+       file, new test.
+       * Makefile.am (TESTSUITE_AT): Update.
+       * NEWS: Update.
+
+
+MB vs WCHAR
+===========
+
+Windows CE only supports the Unicode interface, while DBus Daemon uses
+the Multi-Byte interface on Windows by default.  The glue code does
+not support multibyte in all cases.  In particular, the _mbsrchr
+function is not correctly implemented.  It could be correctly
+implemented, or dbus daemon could use the wchar interface more
+consistently on all Windows targets.  For now, the Windows CE port
+will only work for filesystems without some weird characters in file
+names.  Is this a serious limitation?
+
+
+Known Issues
+============
+
+Autolaunch is broken so far.
+
+Environment variables are faked.  Some are punted to the registry, but
+in any case they can not be used reliably for IPC.
+
+The test suite is not ported yet.
+
+dbus-pipe.c:
+ * Uses libc file descriptors.  Needed for --print-address and
+   --print-pid which probably don't work yet.
+
+dbus-sysdeps-win.c:
+ * Backtraces have been disabled.
+ * _dbus_fd_set_close_on_exec Not supported, maybe we should disable
+   the warning.
+ * SearchPathA: Uses HKLM\\Software\\freedesktop\\DBus\\Install Directory
+   to locate binaries.