doc: show include for each class.

Had to explicitly disable showing includes for files. Useless stuff.

Doxyfile

@@ -132,7 +132,9 @@ FULL_PATH_NAMES        = YES
 # relative paths, which will be relative from the directory where doxygen is
 # started.
 
-STRIP_FROM_PATH        = ../
+STRIP_FROM_PATH        = ../magnum/src \
+                         ../magnum-plugins/src \
+                         ../magnum-integration/src
 
 # The STRIP_FROM_INC_PATH tag can be used to strip a user-defined part of
 # the path mentioned in the documentation of a class, which tells
@@ -478,7 +480,7 @@ HIDE_SCOPE_NAMES       = NO
 # will put a list of the files that are included by a file in the documentation
 # of that file.
 
-SHOW_INCLUDE_FILES     = NO
+SHOW_INCLUDE_FILES     = YES
 
 # If the FORCE_LOCAL_INCLUDES tag is set to YES then Doxygen
 # will list include files with double quotes in the documentation

DoxygenLayout.xml

@@ -108,7 +108,7 @@
   <!-- Layout definition for a file page -->
   <file>
     <briefdescription visible="yes"/>
-    <includes visible="$SHOW_INCLUDE_FILES"/>
+    <includes visible="no"/> <!-- this is useless -->
     <includegraph visible="$INCLUDE_GRAPH"/>
     <includedbygraph visible="$INCLUDED_BY_GRAPH"/>
     <sourcelink visible="yes"/>