Starting out groups
Working on groups
Added basic ring/group/slice insertion/removal. Not tested yet
Groups are now rendered correctly (I hope!)
Text rendering working
Began working on selection
Groups can now be added/edited. Working on removal
Working on removal
More work on groups
More work on groups, fixed cloning, halfway through proper selection,
renamed a few functions to something clearer
Fixed cloning
Started deleting old code and adding new one for spreadsheet models
Removing more things so new code can be added.
Started working on new rendering code
Started version 1.0.0 development. Circles are divided in 60 divisions
of 6 degrees each.
Basic selection is now working. Starting out merging and unmerging.
Fixed navigation between rings and "insert ring outward" action. Also
removed an accelerator for changing the selection
More work on merges
Started to change the draw function to something more intuitive and
maybe lighter
Very basic merging works, though not by user interaction.

Also fixed a bug where divAngle was calculated incorrectly.