Rename Maheno to Walters.
Refactor, and add triple koru.
Refactor and simplify.
Add Row and Range classes

New classes added to make it easier to avoid overlapping korus.
Lots of changes

- Indexing koru patterns from their leftmost point.
- Added Row methods to avoid overlapping patterns, and patterns overlapping the
  edge of the screen.
- Add support for multiple korus per line.
Only draw 1 koru per line. Draw koru closer together
Minor tweaks and cleanup
Fix merge conflict.
Merge branch 'merge-test' of github.com:vortura/walters