Release Notes: This release adds complete extended UUID APIs with pluggable types (by registering make, read, and format methods for new extended UUID types). Corlpack.Issn is provided as an example of the UUID type "issn". This release adds VUUIDs, vectors of (extended) UUIDs, as well as string UUIDs that do not exist independently but as a data structure inside a VUUID. These can represent ASCII strings of arbitrary length. This release fixes some errors in reading/writing time UUIDs and has more tests.