This update fixes the following issues for rednotebook:

- Update to version 1.5.0:
+ New scalable logo.
+ Remember possible undo/redo actions for each day separately.
+ Turn all entries of old "Tags" categories into tags without entries at startup.
+ Suggest last tag when a new tag is added.
+ When suggesting to use the last tag, leave focus on the tag.
+ Enable copy menu item in preview mode. (lp#834473)
+ Only allow hiding words from the cloud, not the tags.
+ Add shortcut (Ctrl+Home) for "Go to Today".
+ Fix undo for tags.
+ Drop support for Python 2.5. This means that we now support Python 2.6 and 2.7.
+ Install translation files in standard directories. (lp#687349)
- Added lang package.