~jaro/balkon

ref: 1a3bbea4c1d1e027e6ec875063cbab30d044322a balkon/src/Data d---------
Upgrade Fragment to contain pen position.
Use CSS3 terminology for fragments and containing block.
Avoid reimplementing Data.Text.Lazy.fromStrict.
Implement "plain" interface.
Use Rect in "plain" interface.
Create "plain" interface.
Add module for working with rectangle coordinates.
Separate modules.
WIP version with WIP interface.