~jaro/balkon

ref: b983e599d307315572e33b209ac5595c44959466 balkon/test/Data/Text/ParagraphLayout d---------
Fix pretty printing for fragmented spans.
Upgrade Fragment to contain pen position.
Clean up ParagraphConstruction.
Use infix operators for constructing test data.
Implement "plain" interface.
Create "plain" interface.
Add module for working with rectangle coordinates.
Add explicit scale to test font.
Separate tests by module.