introduce utils/convert-docs.php script
make `wp help` read intermediary format
pass string to DocParser (makes it easier to unit test)
add a few unit tests for DocParser
DocParser: remove decorations before processing
DocParser: return empty string instead of false
DocParser: implement get_longdesc()
replace get_extra_markdown() with get_longdesc()
convert tabs to spaces only when displaying in the CLI
deprecate WP_CLI::add_man_dir()
add extra newline if longdesc exists
convert-docs.php: indentation fixes
move docs from man-src/ into PHPDoc comments
escape "*/" sequence in media.php
Merge pull request #551 from wp-cli/inline-docs

Replace WP_CLI::add_man_dir() with something better