Merge pull request #827 from gassmoeller/unify_doxygen_documentation

Take over doxygen changes to codespace hosted version

Author: MFraters

doc/doxygen_config.dox

@@ -171,7 +171,7 @@ EXCLUDE_SYMBOLS        =
 EXAMPLE_PATH           = 
 EXAMPLE_PATTERNS       = *
 EXAMPLE_RECURSIVE      = NO
-IMAGE_PATH             = 
+IMAGE_PATH             = sphinx/_static/images/
 INPUT_FILTER           = 
 FILTER_PATTERNS        = 
 FILTER_SOURCE_FILES    = NO
@@ -206,7 +206,7 @@ HTML_FILE_EXTENSION    = .html
 HTML_HEADER            = 
 HTML_FOOTER            = 
 HTML_STYLESHEET        = 
-HTML_EXTRA_STYLESHEET  = 
+HTML_EXTRA_STYLESHEET  = doxygen-awesome.css
 HTML_EXTRA_FILES       = 
 HTML_COLORSTYLE_HUE    = 220
 HTML_COLORSTYLE_SAT    = 100