Luke 0.9 released

 全面支持lucene 2.4.0 索引数据格式。

Changes in v. 0.9:
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This release adds many functionality enhancements and advanced features available in Lucene 2.4.

* New features and improvements:
 o Added new tools:
   + Check Index - checks Lucene indexes for problems, and can fix some
     of them. This is a GUI front-end to the Lucene CheckIndex tool.

   + Export to XML - exports index data and metadata to an XML file.
     This is available both from the GUI and from the command-line.

 o Significantly improved Optimize and Cleanup tools.

 o Added ability to set norms on any indexed field in a document, or a range of documents.

 o Delete multiple documents by specifying ranges of document numbers.

 o Added support for new field functionality: omitTF and binary fields.

 o Improve the low-level information about the index, including format version.

 o Show interesting details about IndexCommit points and associated files.

 o Add short explanations of index files' functions.

 o Improve document reconstruction - now the information from TermFreqVector can be used if available. Also, DocReconstructor can be used outside of Luke.

 o Significantly improved advanced search options - QueryParser settings, Similarity and HitCollector settings.

 o Read-only functionality is supported directly in IndexReader.

* Bug fixes:
A lot of effort went into refactoring the code, moving away if possible from the spaghetti code influenced by Thinlet and into a modular design. Still much needs to be done here. :(

This means that there are likely many more bugs than in the previous release, although I tested all functionality to make sure that there is no data loss.

HOWEVER, if you work with precious data, it's always a good idea to use the "Read-only" option.

As usually, bug reports or suggestions for improvements, or even better patches, are welcome!