Merge branch 'tasks' for Tasks app

apps/calendar/lib/app.php

apps/tasks/ajax/addtask.php

apps/tasks/ajax/addtaskform.php

apps/tasks/ajax/delete.php

apps/tasks/ajax/edittask.php

apps/tasks/ajax/edittaskform.php

apps/tasks/ajax/getdetails.php

apps/tasks/ajax/gettasks.php

apps/tasks/ajax/update_property.php

apps/tasks/appinfo/app.php

apps/tasks/appinfo/info.xml

apps/tasks/css/style.css

apps/tasks/img/icon.png

apps/tasks/img/icon.svg

apps/tasks/index.php

apps/tasks/js/tasks.js

apps/tasks/lib/app.php

apps/tasks/lib/vtodo.php

apps/tasks/templates/part.addtaskform.php

apps/tasks/templates/part.details.php