Pter

Added
- `daily-reload` option added to qpter (issue [49](https://git.spacepanda.se/bold-kitty/pter/issues/49))
- `sort:` expression for (saved) searches (issue [50](https://git.spacepanda.se/bold-kitty/pter/issues/50))

Fixed
- Vertically center tasks in qpter

Added
- Search for `file:`

Fixed
- qpter now detects stale lock files
- Use the application default font if none is given
- Create configuration folder if it's missing (fixes a crash)
- Tasks with due date were not sorted correctly
- qpter would not show proper spacing between words when no font was configured

Added
- Support for dark mode

Added
- qpter can be run with -a/--add-task to activate the running qpter and create
a new task
- -v/--version command line option to show pter's version
- -u/--check-for-updates command line option to check at pypi whether a new
software version is available
- Support for `id:` attributes (automatic ID creation with `id:auto`)
- `auto-id` configuration option
- Support for `after:` attribute (`hide-sequential` configuration option)
- Optionally clickable URLs, contexts, and projects (`clickable`)
- Optionally allow multiple instances of qpter (option `single-instance`)
- Support for `ref:` searches
- "New related task" and "New subsequent task" in qpter

Fixed
- Coloring for due today/tomorrow and overdue corrected
- Don't color as overdue when task is completed
- Color also the checkmark in the 'done' color
- Refreshing task list in qpter was shaky

Fixed
- Sometimes the task list would not update when adding a task
- Added documentation and icons to the distribution files
- Search is correct upon startup

Added
- qpter detects file changes and reloads automatically

Added
- font and font-size configuration option for the GUI
- About dialog in qpter
- .desktop files added to the extras directory
- Select file to create tasks in (in pter)

Fixed
- Use .cache location for settings of pter
- pter and qpter used to highlight single `+` and `` characters

Changed
- curses is now optional (necessary on Windows)
- qpter does not show the list of files if there is only one file available