~jaro/balkon

ref: 39ec2358151d0d99dbeb4528efde98158031920a 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.