make source path relative to Doxygen file to make it work for everyone

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 = /home/wfg/workspace/ADIOSPP/src /home/wfg/workspace/ADIOSPP/include 
+INPUT = ../src ../include 
 
 # 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