Release emulator version 0.16:

1. Fix zero-length datacom message read in IOUnit.
2. Insert additional delay at end-of-message for B5500DatacomUnit.
3. Fix minor behavioral problems in B5500MagTapeDrive.
4. Minor wiki corrections and enhancements.

webUI/B5500DatacomUnit.css

@@ -44,6 +44,7 @@ BUTTON.greenButton {
     border-radius:      4px}
 
 BUTTON.greenLit {
+    color:              black;
     background-color:   #0F0}
 
 BUTTON.blackBorder {