Quickly

- requires parce-0.26.0
- added html language and transform (for lilypond-book)
- add dom.htm element types (for lilypond-book HTML documents)
- added indent module and support for creating properly indented output
- documentation improvements

- requires parce-0.25.0
- Add support for some new LilyPond-2.23 commands
- fixed case where a symbol was interpreted as a pitch eg: \tweak color red do
- fixed some cases where incorrect input was not handled neatly
- documentation improvements

- requires parce-0.24.0
- fixed instance dict in Element nodes, added empty __slots__to mixins
- added Node.filter() and Node.instances_of()
- added a logo (two eighth rests, looking like "ly")
- new website at https://quick-ly.info/
- small optimizations and documentation improvements

- requires parce-0.23.0
- added quickly.numbering module
- added dom.read module to construct elements/documents from text
- removed some temp methods from dom.util
- Element.copy_with_origin now works properly everywhere
- Node.equals() now works for TextElement, by implementing body_equals()
- improvements to TextElement, optional head value checking
- renamed lily.PropToggle to Toggle
- fixed escape warnings in source files
- added duration.shift_duration()
- moved scm.Int to scm.Number in some forgotten places

- required parce version 0.22.0
- lily.Header, lily.Paper and lily.Layout now have easy to use properties to
set variables like title, composer, etc.
- lily.Document now has version attribute to read/set LilyPond version
- added markup construction helper in quickly.dom.markup
- Scheme transform handles all Scheme number features, e.g. xb/f (a fraction
in hex) and even complex numbers

- Milestone: quickly correctly parses my Mouvement piece!
https://github.com/wbsoft/lilymusic/blob/master/berendsen/mouvement.ly
- fixed \rest before duration
- fixed dot missing in scheme pair
- add space after markup commands
- fixed dom.element.build_tree, it lost a node after two \repeat nodes
- parce removed identifier context; we only create Identifier with Assignment
- smartly support \tag and \tweak without direction prepended
- fixed documentation build errors.