Cleaned up __init__.py for main module

ebook_converter/utils/directory.py

@@ -0,0 +1,20 @@
+import os
+
+
+class CurrentDir(object):
+
+    def __init__(self, path):
+        self.path = path
+        self.cwd = None
+
+    def __enter__(self, *args):
+        self.cwd = os.getcwd()
+        os.chdir(self.path)
+        return self.cwd
+
+    def __exit__(self, *args):
+        try:
+            os.chdir(self.cwd)
+        except EnvironmentError:
+            # The previous CWD no longer exists
+            pass