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Changes/New features:
* CHM -> Single HTML conversion
* CHM -> PDF conversion
* CHM -> Plain Text conversion
* Changed option - 'dump' for dumping HTML data from CHM file into standard output.
* Huge code re-factoring and lot of small changes/fixes...
Bug fixes:
* [SF 1767529] IOError exception using CHM dump option
* [SF 1955872] import error
* [SF 1805070] TOC is broken after decompilation
* [SF 1767522] CHM -> single HTML conversion