~jaro/balkon

ref: 3e3fef4440b5d982144bdb4b13a3d784ba686233 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.