judges output format

FAQ.md

@@ -62,11 +62,15 @@ implemented:
 - Results:
     - _comparison OK_
 		- exitcode: 0
-		- stdout: there is a single line with a double value which
+		- stdout: at the beginning of the output, there is a double
-		  should be quality percentage of the judged file
+                  value which should be quality percentage of the judged
+                  file, after that white character as a delimiter can be
+                  present and furthermore some text which can be accessed
+                  within web application
     - _comparison BAD_
 		- exitcode: 1
-		- stdout: can be empty
+		- stdout: might contain text which can be accessed within
+                  web application
 	- _error during execution_
 		- exitcode: 2
 		- stderr: there should be description of error