SC2Mod and SC2Lib are simple dependencies, mods contain data and libs contain triggers, it would be very useful for them to be added to hive to put on the game. Dependencies, if you don't understand them, are basically storage attachment, it allows for sharing, storage, and attachment of such elements. SC comes with three big elements built in, game design, coding, and data. data and coding are stored in mods(SC2Mod) and libraries(SC2Lib) respectively.