Make a rich text document

[Updownquark]

Should support all background and text styles. The API should allow modifying the style of a section of text. Text appended to the document will have the style of the location appended at. Extensive chaining should be used to facilitate easy composition of multi-style documents.

RTF or similar formatting should be used to populate these documents (via labels or rich text fields) from XML. RTF output should also be supported.

[Updownquark]

The basic rich document model is pretty well complete except for listeners. I need to add listeners for content and I also need to probably add some architecture to have listeners for when the style changes. After that:

1. I need to make an extension that supports selection.
2. I need to support rtf or some other rich format.
3. I need to analyze the chaining and maybe improve it. I want it to be super easy to make multi-styled text on a single line. (I may choose to add shortcut methods later, but the single-line capability is there.)

[Updownquark]

New TODO list:

1. Test the simple model--text test and text field test need to work.
2. Support a rich format in the label.
3. Write a test or update the text test to use some rich content.

[Updownquark]

Looks like this is done.