~jaro/balkon

ref: b36dcd9859e8d5209a08186555b8f799ad2c8b0f balkon/src/Data/Text/ParagraphLayout 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.