cargo update

Updates code of conduct

Removes redundant clone

New features release

* Support recurrence;
* Display created date;
* Button to quickly add day/week/month/year to date;
* Flag task;
* Display note as markup.

New features release

* New icons;
* Search;
* Options to display defered/done tasks;
* Display threshold date;
* Support GTK_THEME.

New features release

* Clickable URL;
* Delete multiple keywords;
* Highlight contexts/projects in task subject;
* Display message in application;
* Add task circle;
* Add package for archlinux.

Bug fix

* Fix make install to also install binary.

Initial release

Display tasks in four different views:

* Inbox;
* Projects;
* Contexts;
* Agenda.