Enhance TextPainter to draw Formatted Lists

Enhance TextPainter and related classes such that it supports the drawing of formatted lists.  If you were to use wiki formatting the following figure a would display like figure b.

```
Figure A:
* Item A
** Item A.a
** Item A.b
* Item B
...

Figure B:
● Item A
  ○ Item A.a
  ○ Item A.b
● Item B
...
```
