[DNA] new DNA version 1.20 available

[Philip Leifeld]

Hi,

A new version of the software Discourse Network Analyzer (DNA) is 
available.

Download: http://www.philipleifeld.de

Bugfixes:
- prohibit two concurrent search threads at the same time
- disable search button while searching
- saving upon close sometimes killed the current file
- regular expressions are now directly highlighted after adding them

Improvements:
- statement filter takes less space
- statement list has been replaced by a sidebar where many functions 
reside now
- toolbar replaced by a menu
- collapsible full-text search panel at the bottom of the main window

Please note that this version includes a major update of the user 
interface. If you discover newly introduced bugs, please let me know.

The manual has also been updated.

Best,
Philip