v0.3.0

• Added support for multiple-answers questions.
• Added support for short-answer (fill-in-the-blank) questions.
• Added support for file-upload questions.
• Added support for setting question titles and point values (#9).
• Added support for text regions outside questions.
• Added --pandoc-mathml command-line option. This converts LaTeX to MathML
  via Pandoc, rather than using a Canvas LaTeX rendering URL (#4).
• Added support for comments at the top level of quiz files (outside Markdown
  content like questions, choices, or feedback). HTML comments within
  Markdown are now stripped and no longer appear in the final QTI file (#2).
• For numerical questions, exact answers with allowed margin are now treated
  as exact answers, rather than being converted into ranges of values. This
  primarily affects how feedback for incorrect answers is worded (#7).
• Essay questions now support general feedback.
• Fixed a bug that prevented incorrect question feedback from working.
• Relaxed indentation requirements for quiz titles spanning multiple lines.
  Indentation for wrapped lines must now be at least 2 spaces or 1 tab, rather
  than being equivalent to that of the first character in the title.
• Fixed a bug that allowed trailing whitespace to cause incorrect indentation
  calculations, resulting in indentation errors in valid quizzes.