Use readme as home

Doxyfile

@@ -917,7 +917,7 @@ WARN_LOGFILE           =
 # spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  = "src"
+INPUT                  = README.md "src"
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
@@ -2689,4 +2689,5 @@ GENERATE_LEGEND        = YES
 # The default value is: YES.
 
 DOT_CLEANUP            = YES
-GENERATE_HTML = YES
+GENERATE_HTML = YES
+USE_MDFILE_AS_MAINPAGE = README.md