~jaro/balkon

ref: b983e599d307315572e33b209ac5595c44959466 balkon/src/Data/Text/ParagraphLayout d---------
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.