ldforge2: graph

graph

work on saving
2021-09-27, by Teemu Piippo
Document and refactor colors.cpp and colors.h
2021-09-22, by Teemu Piippo
Document model.h
2021-09-22, by Teemu Piippo
Add documentation to model.cpp
2021-09-22, by Teemu Piippo
Work on edit history
2021-09-22, by Teemu Piippo
Merge commit
2021-09-21, by Teemu Piippo

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