~jaro/balkon

ref: cf3ec3e35ebdbbe540c0a1490545622157271543 balkon/test/Data/Text/ParagraphLayout d---------
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.