Allow create and delete folders with spaces

This patch adds support to create and delete folders with the space
character.

When the folder includes spaces, all the folder name must be quoted.

Close: #58

Signed-off-by: Rodolfo García Peñas (kix) <kix@kix.es>

offlineimap/repository/IMAP.py

@@ -772,6 +772,10 @@ class IMAPRepository(BaseRepository):
     def deletefolder(self, foldername):
         """Delete a folder on the IMAP server."""
 
+        # Folder names with spaces requires quotes
+        if ' ' in foldername:
+            foldername = '"' + foldername + '"'
+
         if self.account.utf_8_support:
             foldername = imaputil.utf8_IMAP(foldername)
         imapobj = self.imapserver.acquireconnection()
@@ -833,6 +837,10 @@ class IMAPRepository(BaseRepository):
             return
         imapobj = self.imapserver.acquireconnection()
         try:
+            # Folder names with spaces requires quotes
+            if ' ' in foldername:
+                foldername = '"' + foldername + '"'
+
             if self.account.utf_8_support:
                 foldername = imaputil.utf8_IMAP(foldername)