0.3.0

Changes since last release (0.2.14...0.3.0)

• Significant test coverage and code clean up. (#82, #83, Brian Anderson)
• Description list support. (#86, Ayose Cazorla)
• Example use of comrak to convert CommonMark documents into S-expressions. (#86, Ayose Cazorla)
• Footnotes are now enabled via an extension option, not a flag of its own. (#87)
• Extend cmark-gfm compatibility to include all extension and regression tests. (#87)