Add a few more progress prints during parser generation

src/main/java/org/sablecc/sablecc/Grammar.java

@@ -96,6 +96,8 @@ public final class Grammar
     LR1Collection collection = new LR1Collection(set
                                                 );
 
+    System.out.println(" - Computing parse table.");
+
     LR0ItemSet[] sets = collection.collection.sets();
     Symbol[] terminals = Symbol.terminals();
     Symbol[] nonterminals = Symbol.nonterminals();

src/main/java/org/sablecc/sablecc/LR0Collection.java

@@ -22,6 +22,8 @@ final class LR0Collection
   LR0Collection(LR0ItemSet set
                  )
   {
+    System.out.println(" - Computing LR(0) items.");
+
     add
       (set
           , -1, null);

src/main/java/org/sablecc/sablecc/LR1Collection.java

@@ -24,6 +24,8 @@ final class LR1Collection
     collection = new LR0Collection(set
                                   );
 
+    System.out.println(" - Computing LR(1) items.");
+
     // Initialize lookaheads to nothing, propagation to nothing
     LR0ItemSet[] sets = collection.sets();
     @SuppressWarnings("unchecked")