some updates

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@1241 57a11ea4-9604-0410-9ed3-97b8803252fd

src/engine/README

@@ -7,8 +7,8 @@ There should be no GUI code in this subdirectory, and,
 ideally, it should build cleanly and independently of 
 any GUI elements or assumptions.
 
-To Be Done:
-----------
-Provide detailed documentation for the architecture & design here.
+For design documentation, please see the file "design.txt",
+and also, look at the header files carefully.  The documentation
+for each royutine is in the header files for that routine.
 
-February 1998
+September 1998