Fix ReportDialog's code loading logic (#275)

* Fix bug in ReportDialog

Now it will always contain the last file opened.

* Mention the new report dialog in release notes

RELEASE_NOTES

@@ -12,7 +12,8 @@ Notes for this release:
 This is version 1.2.6 of EduMIPS64, a release that follows up on version 
 1.2.5, that was released in August 2018. This release contains a couple of
 changes, a new instruction alias (DMULU for DMULTU), an increased memory 
-size (640kB) and several bug fixes. 
+size (640kB), a better way to report bugs via GitHub and several bug fixes. 
+
 The codename for this release is Phlegmatic. First because it took a while
 to release a new version after 1.2.5. Second because I am releasing it while
 fighting with a bad and annoying cough, which I hope goes away as soon as

src/main/java/org/edumips64/Main.java

@@ -501,7 +501,6 @@ private static void openFile(String file) {
     cpu.reset();
     symTab.reset();
     dinero.reset();
-
     try {
       // Update GUI components
       front.updateComponents();
@@ -515,7 +514,9 @@ private static void openFile(String file) {
 
       try {
         String absoluteFilename = new File(file).getAbsolutePath();
-        code = parser.parse(absoluteFilename);
+        LocalFileUtils lfu = new LocalFileUtils();
+        code = lfu.ReadFile(absoluteFilename);
+        parser.parse(absoluteFilename);
       } catch (ParserMultiWarningException pmwe) {
         new ErrorDialog(mainFrame, pmwe.getExceptionList(), CurrentLocale.getString("GUI_PARSER_ERROR"), configStore.getBoolean(ConfigKey.WARNINGS));
       } catch (NullPointerException e) {

src/main/java/org/edumips64/core/parser/Parser.java

@@ -110,14 +110,13 @@ public Parser(FileUtils utils, SymbolTable symTab, Memory memory, InstructionBui
    * @throws SecurityException if a security manager exists and its checkRead method denies read access to the file.
    * @returns A string containing the code parsed.
    */
-  public String parse(String filename) throws ParserMultiException, ReadException {
+  public void parse(String filename) throws ParserMultiException, ReadException {
     logger.info("About to parse " + filename);
     this.filename = filename;
     basePath = fileUtils.GetBasePath(filename);
     String code = preprocessor(filename);
     doParsing(code);
     logger.info(filename + " correctly parsed.");
-    return code;
   }
 
   /** Replace all Tabulator with space