Added the suffix AST to the ast nodes and some initial work on the GLSL type system.

src/plugins/glsleditor/glsleditor.cpp

@@ -264,7 +264,7 @@ void GLSLTextEditor::updateDocumentNow()
 
     Engine engine;
     Parser parser(&engine, preprocessedCode.constData(), preprocessedCode.size(), variant);
-    TranslationUnit *ast = parser.parse();
+    TranslationUnitAST *ast = parser.parse();
 
     QTextCharFormat errorFormat;
     errorFormat.setUnderlineStyle(QTextCharFormat::WaveUnderline);