Turn inspections up to 11

OK, so let's get this out of the way, there's some actual changes mixed
in here too. I'm really sorry:
 - Turtles can now not be renamed with unnamed item tags (previously it
   would clear the name, this seemed a little unideal).
 - commands.getBlock(s)Data will also include NBT.

Now, onto the horror story which is these inspection changes:
 - Make a lot of methods static
 - Typo fixes
 - Make utility classes final + private constructor
 - Lots of reformatting (ifs -> ternary, invert control flow, etc...)
 - ???
 - Profit!

I'm so going to regret this - can pretty much guarantee this is going to
break something.

src/main/java/dan200/computercraft/client/gui/GuiPrintout.java

@@ -44,12 +44,6 @@ public class GuiPrintout extends GuiContainer
         m_book = ItemPrintout.getType( container.getStack() ) == ItemPrintout.Type.Book;
     }
 
-    @Override
-    public boolean doesGuiPauseGame()
-    {
-        return false;
-    }
-
     @Override
     protected void keyTyped( char c, int k ) throws IOException
     {
@@ -80,7 +74,7 @@ public class GuiPrintout extends GuiContainer
         }
         else if( mouseWheelChange > 0 )
         {
-            // Scroll down goes to the next page
+            // Scroll down goes to the previous page
             if( m_page > 0 ) m_page--;
         }
     }
@@ -99,9 +93,9 @@ public class GuiPrintout extends GuiContainer
     public void drawScreen( int mouseX, int mouseY, float partialTicks )
     {
         // We must take the background further back in order to not overlap with our printed pages.
-        zLevel = zLevel - 1;
+        zLevel--;
         drawDefaultBackground();
-        zLevel = zLevel + 1;
+        zLevel++;
 
         super.drawScreen( mouseX, mouseY, partialTicks );
         renderHoveredToolTip( mouseX, mouseY );