1.5.5: Bug fixes, IDE plugin improvements, line breaking tweaks

• Fixed the following bugs:
  • #53: The collapse-single-line setting does not work in the IDE
  • #69: Paragraph + list (stability), variation 2
  • #70: Multi-line @link isn't converted if there's a #
  • #71: Make plugin dynamic
  • #72: @param with brackets is not supported
  • A bug where <p> paragraphs following a blank line would be
    deleted (without leaving a blank paragraph separator)
• Changed heuristics around optimal or greedy line breaking in list
  items and for KDoc tag and TODO-item paragraph formatting.
• The .editorconfig support is improved. It will now pick up the nearest
  applicable .editorconfig settings for a file, but any options
  explicitly set from the command line will override the .editor config.
  • Also, the "collapse documents that fit on a single line" option,
    instead of just defaulting to true, will now use the default
    specified for the equivalent setting for Java (if set), ensuring a
    more consistent codebase. (You can also set it for Kotlin using
    ij_kotlin_doc_do_not_wrap_if_one_line, though that option isn't
    supported in the IDE or by the Kotlin plugin currently.)
• Preliminary support for formatting line comments and block comments
  (enabled via new flags, --include-line-comments and
  --include-block-comments.)
• Misc IDE plugin improvements
• <pre> tags are converted into KDoc preformatted block