Renamed some `instance()` overloads to `instanceJoining()` because there can only be one `instance()` method on a ValueType (related to ceylon/ceylon-compiler#1700)
Added `instance()` and static versions of `get()` and `set()` because this is required for ValueTypes (related to ceylon/ceylon-compiler#1700)
Updated to latest version of generated `XxxxArray` types (related to ceylon/ceylon-compiler#1700)