Enhancements:
- Added option to specify Shift_JIS or UTF-16 as character code (encoding method).
- Feature to specify default values for Word to HTML conversion parameters in a file.
- Feature to save parameters at Word to HTML conversion execution in a file for default values.
- Added option to not output style tag for default styling setting.
- Added option to convert each indent at the beginning of each paragraph in Word to a single full-width space.
