UPS... accidentially deleted the input list

[[Imported from SVN: r3116]]

doc/doxygen/Doxyfile

@@ -362,7 +362,14 @@ WARN_LOGFILE           =
 # with spaces.
 
 INPUT                  = mainpage \
-                         ../../grid
+                         ../../grid \
+                         ../../disc \
+                         ../../fem \
+                         ../../common \
+                         ../../quadrature \
+                         ../../solver \
+                         ../../istl \
+                         ../../io
 
 # If the value of the INPUT tag contains directories, you can use the 
 # FILE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp