~jaro/balkon

ref: 9927e551b32660d4bc536bd0b5aa1b3222613c4b balkon/test d---------
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.
Automatically discover test specs.
Separate tests by module.
Add unit tests for spanToRuns.
WIP version with WIP interface.