Adding path.existsSync (with tests.)

lib/path.js

@@ -79,3 +79,12 @@ exports.exists = function (path, callback) {
     if (callback) callback(err ? false : true);
   });
 };
+
+exports.existsSync = function (path) {
+  try {
+    process.binding('fs').stat(path)
+    return true;
+  } catch(e){
+    return false;
+  }
+};

test/simple/test-path.js

@@ -12,6 +12,8 @@ assert.equal(path.dirname("/a"), "/");
 assert.equal(path.dirname("/"), "/");
 path.exists(f, function (y) { assert.equal(y, true) });
 
+assert.equal(path.existsSync(f), true);
+
 assert.equal(path.extname(""), "");
 assert.equal(path.extname("/path/to/file"), "");
 assert.equal(path.extname("/path/to/file.ext"), ".ext");