v1.3.0

• Flexible Datetime Parsing
  Improved datetime handling using dateutil.parser, allowing support for a wider range of input datetime formats.

• Automatic File Encoding Detection
  Integrated UniversalDetector to automatically detect file encoding. This enables support for various encodings beyond ASCII and ISO-8859-1 (e.g., UTF-8, Windows-1252, etc.). Note: Introduces a new dependency on chardet.

• Internal Data Structure Enhancement
  Refactored internal representation of characteristics: switched from list to dict structure to better handle cases with zero elements or gaps in the characteristic counter. Fix for #3