CassDataType missing functions

[Lorak-mmk]

Function list:

• [x] cass_data_type_new_tuple
• [ ] cass_data_type_is_frozen
• [x] cass_data_type_type_name
• [x] cass_data_type_keyspace
• [x] cass_data_type_class_name
• [x] cass_data_type_set_class_name
• [x] cass_data_type_set_class_name_n
• [x] cass_data_type_sub_data_type
• [x] cass_data_type_sub_data_type_by_name
• [x] cass_data_type_sub_data_type_by_name_n
• [x] cass_data_type_sub_type_name
• [x] cass_data_type_add_sub_type
• [x] cass_data_type_add_sub_value_type

[Gor027]

cass_data_type_is_frozen implementation will be added in this PR.