Add test cases for comparison ops and int literals

README.mdwn

@@ -20,7 +20,7 @@ The test cases are divided in 5 'modes':
 - __semantic__: Test cases that check semantic checking of MiniJava programs
 - __exec__: Test cases that check the correct compilation of MiniJava programs.
 
-_Only the lexer, syntax and ast mode is currently usable, but the others will follow._
+_Only the lexer, syntax, ast and semantic  mode are currently usable, but the others will follow._
 
 The test different test cases for each mode are located in a folder with the same name.
 The default directory that contains all test folders is `tests`.