remove obsolete shell helpers, upgrade the Makefile
refactor, stage 1
refactor, stage 2
refactor, stage 3
refactor, stage 4
refactor, stage 5
refactor, stage 6
satisfy dialyzer
refactor names: Index->Coord; add comments
minor names refactor, fix specs
database location configuration added
typo fix
discrepancy fixes
navigation fixes
gameplay fixes
cli: dump/import operations
doc: overview page minor fixes
version bump