~jaro/balkon

ref: 88a5b6c714c5543b01d63d836ad403b5755d8d76 balkon/test/Data/Text 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.