Markdown2

- [pull 356] Don't merge sequential quotes into a single blockquote
- [pull 357] use style=text-align for table alignment
- [pull 360] introduce underline extra
- [pull 368] Support for structured and nested values in metadata
- [pull 371] add noopener to external links

- [pull 335] Added header support for wiki tables
- [pull 336] Reset _toc when convert is run
- [pull 353] XSS fix
- [pull 350] XSS fix

- [pull 317] Temporary fix to issue 150
- [pull 319] Stop XML escaping the body of a link
- [pull 322] Don't auto link patterns surrounded by triple quotes
- [pull 324] Add class configurability to the enclosing tag
- [pull 328] Accept [X] as marked task

- [pull 306] Drop support for legacy Python versions
- [pull 307] Fix syntax highlighting test cases that depend on Pygments output
- [pull 308] Add support for Python 3.7
- [pull 304] Add Wheel package support
- [pull 312] Fix toc_depth initialization regression
- [pull 315] XSS fix

- [pull 282] Add TOC depth option
- [pull 283] Fix to add TOC html to output via CLI
- [pull 284] Do not remove anchors in safe_mode
- [pull 288] fixing cuddled-lists with a single list item
- [pull 292] Fix Wrong rendering of last list element
- [pull 295] link-patterns fix
- [pull 300] Replace a deprecated method
- [pull 301] DeprecationWarning: invalid escape sequence
- [pull 302] Fix "make test" in Python 3
- [pull 303] Fix CVE-2018-5773

- [pull 238] Fenced code blocks lang with leading space
- [pull 260] Search for items only within metadata header
- [pull 264] highlightjs language class support
- [pull 265] FIPS compliance
- [pull 274] Fix for double amp replacement inside link title