Initialize rewrite of build_db.py for use with Wikipedia's Special:Export
Rename atomicNumber to number
PropertiesActivity: Fix multiple crashes
build_db.py: Add weight, category, group, period and block properties
PropertiesAdapter: Do not patch group property
TableAdapter: Add custom background for elements with unknown chemical properties
build_db.py: Add electron configuration
build_db.py: Add 'Electrons per shell' property
PropertiesAdapter: Add 'Electrons per shell' property
build_db.py: Add wikipedia links
build_db.py: Add appearance property
build_db.py: Add phase property
build_db.py: Small improvements
build_db.py: Add density property
build_db.py: Add Liquid density at melting point property
build_db.py: Add Liquid density at boiling point property
build_db.py: Small improvements
build_db.py: Add melting point property
build_db.py: Add sublimation point property
build_db.py: Add boiling point property