* Reduced code size and complexity.
* Reduced memory consumption.
* Caching made optional and prefetching independent of caching.
* Further interface consolidation.
* Transient bookmarking mechanism replaced with optionally persistent
  bookmarking mechanism.
* Rudimentary annotation support.
* Changed the search interface to allow several concurrent search processes.
* Added '--unique' command-line option to the system-wide launcher.
* Added Czech translation. Thanks to Pavel Fric.
* Added partial Greek translation. Thanks to athmakrigiannis.
* Added partial Russian translation. Thanks to v_2e.
* Added Slovak translation. Thanks to DAG Software.