Added a 'makeopendir' method which makes and opens a directory in one. Made FS objects iterable

fs/base.py

@@ -246,6 +246,12 @@ class FS(object):
         raise UnsupportedError("check for file")
 
 
+    def __iter__(self):
+        """ Iterates over paths returned by listdir method with default params. """
+        for f in self.listdir():
+            yield f
+
+
     def listdir(self,   path="./",
                         wildcard=None,
                         full=False,
@@ -689,11 +695,26 @@ class FS(object):
         return False
 
 
+    def makeopendir(self, path, recursive=False):
+        """Makes a directory (if it doesn't exist) and returns an FS object for
+        the newly created directory.
+
+        path -- Path to the new directory
+        recursive -- If True any intermediate directories will be created
+
+        """
+
+        self.makedir(path, allow_recreate=True, recursive=recursive)
+        dir_fs = self.opendir(path)
+        return dir_fs
+
+
+
 
 class SubFS(FS):
     """A SubFS represents a sub directory of another filesystem object.
 
-    SubFS objects are returned by opendir, which effectively creates a 'sandbox'
+    SubFS objects are returned by opendir, which effectively creates a
     'sandbox' filesystem that can only access files/dirs under a root path
     within its 'parent' dir.
     """
@@ -825,4 +846,3 @@ def flags_to_mode(flags):
     else:
         mode = "r"
     return mode
-