fix typo Promise -> PromiseA (for node 0.10.x)

lib/fsapi.js

@@ -224,7 +224,7 @@ function copyfs(blogdir, files) {
 
     dirpaths[pathname] = true;
     
-    return Promise.resolve();
+    return PromiseA.resolve();
   }).then(function () {
     // TODO is it better to do this lazy-like or as a batch?
     // I figure as batch when there may be hundreds of files,
@@ -285,7 +285,7 @@ function putfs(blogdir, files) {
 
     dirpaths[pathname] = true;
     
-    return Promise.resolve();
+    return PromiseA.resolve();
   }).then(function () {
     // TODO is it better to do this lazy-like or as a batch?
     // I figure as batch when there may be hundreds of files,