Create a new subdirectory for the common dialog box DLL and move all
code from /misc/commdlg.c to this directory.  Also made a start in
documenting the API calls.

diff --git a/configure.in b/configure.in
index 3caa6b4..e415059 100644
--- a/configure.in
+++ b/configure.in
@@ -623,6 +623,7 @@
 dlls/Makefile
 dlls/advapi32/Makefile
 dlls/comctl32/Makefile
+dlls/commdlg/Makefile
 dlls/imagehlp/Makefile
 dlls/msacm/Makefile
 dlls/msacm32/Makefile