change mainpage to REAMDE.md

doc/Doxyfile

@@ -771,7 +771,7 @@ WARN_LOGFILE           =
 # spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  = ../src/ ../alpine/ examples  extras
+INPUT                  = ../src/ ../alpine/ ../README.md examples  extras
 
 # 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
@@ -844,7 +844,7 @@ EXCLUDE_SYMBOLS        =
 # that contain example code fragments that are included (see the \include
 # command).
 
-EXAMPLE_PATH           = ../alpine/ ../examples/ mainpage.md
+EXAMPLE_PATH           = ../alpine/ ../examples/ #mainpage.md
 
 # If the value of the EXAMPLE_PATH tag contains directories, you can use the
 # EXAMPLE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp and
@@ -920,7 +920,7 @@ FILTER_SOURCE_PATTERNS =
 # (index.html). This can be useful if you have a project on for instance GitHub
 # and want to reuse the introduction page also for the doxygen output.
 
-USE_MDFILE_AS_MAINPAGE = MainPage.md
+USE_MDFILE_AS_MAINPAGE = ../README.md
 
 #---------------------------------------------------------------------------
 # Configuration options related to source browsing