Add surname, address, post_code, and sex similarities   - Add get_surname_similarity   - Add extract_surname_similarity   - Add get_address_similarity   - Add get_post_code_similarity   - Start get_sex_similarity
Add surname, address, post_code, and sex similarities
  - Add get_surname_similarity
  - Add extract_surname_similarity
  - Add get_address_similarity
  - Add get_post_code_similarity
  - Start get_sex_similarity

nsh87/ehrcorral