Parceqt

- requires parce 0.32.0
- added gadgets module with ExtraSelectionManager and LanguageMenuAction
- added widgets module with LexiconChooser
- debugger: added language selection in View menu
- simplified handling of singleton QObject instances.

- requires parce 0.31.0
- Document() now also can create QTextDocument; use Document(doc) to wrap an
existing document
- small adaptations to parce API changes

- requires parce 0.27
- add work module and adapt design to new parce Document/Worker
- add Guess button to debugger, to guess the language

- bring version number and some API changes on par with parce
- adjust debugger to API changes of parce.language; now use parce.registry

- added Cursor.html() and copy_html() convenience methods
- moved debugging logic (signals etc) to main treebuilder
- debug: removed DebugFormatter, parce can now handle debug formatting itself
- debug window: larger text font by default
- fixed black colors in palette when textformat didn't specify color
- fixed other little bugs
- small api adjustments to parce-0.17.0

- added Edit → Copy selection as HTML
- parceqt.cursor(): fixed new attrname cursor.start → cursor.pos