~jaro/balkon

ref: 0552e4817ad8e6eb582920c72dd62dc0dd50bfb4 balkon/src/Data/Text 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.
WIP version with WIP interface.