Bcloud

* Fixed: modify file handler mode from `ab` to `rb+`. That's a serious problem!
* Fixed: average download speed is incorrect; see https://github.com/LiuLang/bcloud/issues/15

* Feature: add download-mode option
* Feature: add upload-mode option
* Feature: add "Upload to this Folder" menu item
* Feature: support multiple connetions per download task
* Code format changed
* Download manager redesigned
* Fixed: remove task info when downloading task is removed from task-list
* Fixed: uncheck remember-password button when keyring module is unavailable
* Fixed: remove assertion of `ondup`
* Fixed: catch URLError
* i18n updated

* Automatically restart task when error occurs
* Fixed: Gdk-WARNING **: gdk_window_set_icon_list: icons too large
* Expires local cookie cache after 24h
* Fixed: local variable password referenced before assignment; reported by rmokerone
* Fixed: failed to check upload folder; reported by lilymona
* Rename filename when downloading
* Notify user if failed to parse remote download link
* Support debian 7.5
* Add classifiers
* i18n updated

* Fixed: failed to check vcodestr in SigninDialog

* Update signin process
* Fixed: sqlite3 has not LIMIT syntax in ubuntu 12.04
* Disable dark theme by default
* Check RSA module is availabel in old distributiions
* Set keyring module as optional
* Support GBK encoding in cloud-download page
* Fixed: failed to download multiple selected items in treeview
* i18n updated

* Increase downloading chunk size
* Check local file size
* FIxed: local file is removed after downloading
* Fixed: TypeError: 'pixbuf' object does not support indexing
* Fixed: error occurs when adding multiple cloud tasks
* Fixed: catch binascii.Error: Incorrect padding exception
* Discard auth cache if current user password is modified