~jaro/balkon

ref: 23c52ba5b3a933207890308c867d196674bc0784 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.