Renamed fileReadStream -> createReadStream

Did the same for fileWriteStream as well.

lib/fs.js

@@ -376,7 +376,7 @@ exports.realpath = function(path, callback) {
   });
 }
 
-exports.fileReadStream = function(path, options) {
+exports.createReadStream = function(path, options) {
   return new FileReadStream(path, options);
 };
 
@@ -465,7 +465,7 @@ var FileReadStream = exports.FileReadStream = function(path, options) {
 };
 FileReadStream.prototype.__proto__ = process.EventEmitter.prototype;
 
-exports.fileWriteStream = function(path, options) {
+exports.createWriteStream = function(path, options) {
   return new FileWriteStream(path, options);
 };
 

test/simple/test-file-read-stream.js

@@ -2,7 +2,7 @@ process.mixin(require('../common'));
 
 var
   fn = path.join(fixturesDir, 'multipart.js'),
-  file = fs.fileReadStream(fn),
+  file = fs.createReadStream(fn),
 
   callbacks = {
     open: -1,

test/simple/test-file-write-stream.js

@@ -2,7 +2,7 @@ process.mixin(require('../common'));
 
 var
   fn = path.join(fixturesDir, "write.txt"),
-  file = fs.fileWriteStream(fn),
+  file = fs.createWriteStream(fn),
 
   EXPECTED = '0123456789',