MAYBE:
  - Syntax highlight checkboxes and checkbox cookies
  - Separate syntax group for heading delimiters
  - Syntax highlight and indent properties
  - Hightlight concealed TeX the same as normal text
  - Close inline block using same number of starting delimiters.
  - Try to get text attributes to stack (e.g. underlined text in bold text)
    - TeX math fragments in bold, italic, etc. text
  - Set a max number of lines to search for end delimiter for bold/italic/etc. to 3 (might not be possible)

UNLIKELY:
  - Implement Emacs's abbreviations (e.g. '\<s<TAB>')