更新日志：

• Decoding to WAV format implemented
• Multiple files conversion implemented
• Player for original/converted files in batch list implemented
• Batch list is now can be sorted
• Template based output path generation implemented
• Major interface improvements: toolbar, main menu, status bar are added
• Fixed bug which was cause of random software crushes when converting to mp3 format
• Bug when all output file names were created in lower case is fixed
• Fixed some spelling in UI texts
• Problem when some of M4P tags were not transferred to output file is fixed