Log Message:
Update to 0.53

=== 0.53 - Mon 19 Sep 2011 ===
* Cosmetic updates to entry widgets, the page index, the insert date dialog,
  and the tasklist dialog
* Updated the find function to properly switch focus and highlight current
  match even when text does not have focus - Oliver Joos
* Added function to remember the position of the main window across sessions
  and the position of dialog within a session - Oliver Joos
* Added "interwiki keyword" to give shorthand for linking notebooks - \ 
Jiří
  Janoušek
* Added template function to create a page index - Jiří Janoušek
* Added support to include additional files with a template - Jiří Janoušek
* Added preference for always setting the cursor position based on history
  or not
* Added feature so images now can have a link target as well - Jiří Janoušek
* Refactored index to do much less database commit actions, resulting in
  performance gain on slow storage media
* Added "print to browser" button in the tasklist dialog
* Added "--search" commandline option
* Added feature for calendar plugin to use one page per week, month, or year
  instead of one page per day - Jose Orlando Pereira
* Added feature to have implicit deadline for tasks defined on a calendar
  page - Jose Orlando Pereira
* Added new plugin for evaluating inline arithmetic expressions - Patricio Paez
* Added support for plugins to have optional dependencies - John Drinkwater
* Added hook so plugins can register handlers for specific URL schemes
* Upgraded test suite to unittest support shipped with python 2.7
* Increased test coverage for main window, dialogs, and image generator plugins
* Many small typo fixes and code cleanup - Oliver Joos
* Extensive updates for the developer API documentation - now using epydoc
* Made file paths in config file relative to home dir where possible in order
  to facilitate portable version (e.g. home dir mapped to USB drive)
* Build code updated to build new windows installer and support for portable
  install - Brendan Kidwell
* Fixed build process to hardcode platform on build time (maemo version)
* Fixed bug in notebook list, causing compiled version to be unable to set
  a default notebook (windows version)
* Fixed bug with copy-pasting and drag-n-drop using relative paths
* Fixed bug allowing to click checkboxes in read-only mode
* Fixed several possible exceptions when moving pages
* Fixed execution of python scripts on windows - Chris Liechti
* Fix to preserve file attributes (like mtime) when copying attachments
  - Oliver Joos
* Fixed path of checkbox images in html export - Jiří Janoušek
* Fix for indexing error in scenario with external syncing (e.g. dropbox)
* Fix for latex output to use "\textless{}" and "\textgreater{}"
* Fixed Maemo window class, and python 2.5 compatibility - Miguel Angel Alvarez
* Fixed unicode usage in template module - Jiří Janoušek
* Fixed error handling for errors from bzr in versioncontrol plugin
* Fixed error handling for errors due to non-utf-8 encoded text in pages