chyrp-markdown 3.0

Changes in this release:

• Added GitLab-Flavored Markdown.
• Added parser property blockPriorities to pre-define block call order (see README).
• Removed public property contextId: use methods getContextId() and setContextId().
• HeadlineTrait: added GitHub-style anchors, controlled by the headlineAnchors property.
• HtmlTrait: recognised HTML entities are decoded when rendering (except <, >, &, ").
• CFM: added FencedAsideTrait and FencedQuoteTrait.