added vnc constants module

examples/vncviewer/constants.js

@@ -0,0 +1,36 @@
+// based on https://github.com/substack/node-rfb
+exports.clientMsgTypes = {
+    setPixelFormat : 0,
+    setEncodings : 2,
+    fbUpdate : 3,
+    keyEvent : 4,
+    pointerEvent : 5,
+    cutText : 6,
+};
+
+exports.serverMsgTypes = {
+    fbUpdate : 0,
+    setColorMap : 1,
+    bell: 2,
+    cutText: 3,
+};
+
+exports.encodings = {
+    raw : 0,
+    copyRect : 1,
+    rre : 2,
+    hextile : 5,
+    zrle : 16,
+    pseudoCursor : -239,
+    pseudoDesktopSize : -223,
+};
+
+exports.security = {   
+    None: 1,
+    VNC: 2
+};
+
+exports.connectionFlag = {
+    Exclusive: 0,
+    Shared: 1
+}