Merge branch '374-doxygen-missing-logo' into 'master'

Resolve "Doxygen missing logo"

Closes #374

See merge request !214

Doxyfile

@@ -51,7 +51,7 @@ PROJECT_BRIEF          = "OPAL"
 # and the maximum width should not exceed 200 pixels. Doxygen will copy the logo
 # to the output directory.
 
-PROJECT_LOGO           = ./amas.png
+PROJECT_LOGO           =
 
 # The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) path
 # into which the generated documentation will be written. If a relative path is