Set version to 0.5.0-dev.
Adds options to set version range.
Refactors. Adds blank option.
Updates readme.
Refactors blank option.
Adds image output. Refactors.
Fixes.
Updates makefile.
Refactorings. Adds optional label, image and rounded corners.
Adds demo.
Final changes.
Prepares release.
Merge branch 'develop'