Renamed some `instance()` overloads to `instanceJoining()` because there can only be one `instance()` method on a ValueType (related to #1700)
Renamed some `instance()` overloads to `instanceJoining()` because there can only be one `instance()` method on a ValueType (related to #1700)

gijsleussink/ceylon,gijsleussink/ceylon,gijsleussink/ceylon,gijsleussink/ceylon,gijsleussink/ceylon