Task-indicator

- Fixed a bug in database parser error reporting.

- Search window no longer closes when a task dialog is opened
by double-clicking a table row.
- The "Show all" checkbox in the search window is now named
"show completed".
- There's now an "Add" button in the search window.

- License changed to MIT.
- Fixed adding new tasks.
- Fixed notes from last edited task showing up in the new task dialog.

- Start/Stop buttons no longer reset current project.
- Fixed parsing tags with taskw.
- Support for task notes.

2013/10/18
- Start/Stop button no longer closes the properties dialog.
- The taskw module now also reads completed and deleted tasks.
- Fixed completed tasks being shown by default.

2013/10/17
- Added a new module taskw.py, which is a simple database parser.
- Current task duration is shown in the properties dialog.
- Sorting by urgency temporarily doesn't work.

- Tasks tagged with "pin" are always show at the top of the indicator menu.

- Tasks tagged as "endless" moved to the end of the indicator menu.