SERVER-7436 add Timestamp to autocomplete list

Author: Tad Marshall

src/mongo/shell/utils.js

@@ -1273,7 +1273,7 @@ shellAutocomplete = function ( /*prefix*/ ) { // outer scope function called on
     builtinMethods[Mongo] = "find update insert remove".split( ' ' );
     builtinMethods[BinData] = "hex base64 length subtype".split( ' ' );
 
-    var extraGlobals = "Infinity NaN undefined null true false decodeURI decodeURIComponent encodeURI encodeURIComponent escape eval isFinite isNaN parseFloat parseInt unescape Array Boolean Date Math Number RegExp String print load gc MinKey MaxKey Mongo NumberInt NumberLong ObjectId DBPointer UUID BinData HexData MD5 Map".split( ' ' );
+    var extraGlobals = "Infinity NaN undefined null true false decodeURI decodeURIComponent encodeURI encodeURIComponent escape eval isFinite isNaN parseFloat parseInt unescape Array Boolean Date Math Number RegExp String print load gc MinKey MaxKey Mongo NumberInt NumberLong ObjectId DBPointer UUID BinData HexData MD5 Map Timestamp".split( ' ' );
 
     var isPrivate = function( name ) {
         if ( shellAutocomplete.showPrivate ) return false;