flexmark-java extension for typographic processing

Converts:

• ' to apostrophe ’ ’
• ... and . . . to ellipsis … …
• -- en dash – –
• --- em dash — —
• single quoted 'some text' to ‘some text’ ‘some text’
• double quoted "some text" to “some text” “some text”
• double angle quoted <<some text>> to «some text» «some text»