fix doc: big update

- use single doxyfile instead of one per module
- use a cleaner and more modern style
- reorder sections to put details first
- hide diagrams by default
- remove deprecated doxygen variables
- disable latex generation by default
- fix some doc typos

eo/doc/CMakeLists.txt

@@ -32,8 +32,9 @@ IF (DOXYGEN_FOUND)
   ENDIF (DOXYGEN_EXECUTABLE)
 
   # configure cfg file
+    # "${CMAKE_CURRENT_SOURCE_DIR}/${EO_DOC_CONFIG_FILE}.cmake"
   CONFIGURE_FILE(
-    "${CMAKE_CURRENT_SOURCE_DIR}/${EO_DOC_CONFIG_FILE}.cmake"
+    "${CMAKE_SOURCE_DIR}/doxyfile.cmake"
     "${CMAKE_CURRENT_BINARY_DIR}/${EO_DOC_CONFIG_FILE}"
     )