Initial attempt at Either, extracted from experiments while developing Blaise
* construction
- construct from value
- construct from optional and value
- construct from optional and supplier
- construct from unchecked supplier
- construct from checked supplier
* equality
- equal iff value equal
* usage
- get value
- test left
- convert left to optional
- convert right to optional
- map
- flatMap
- convert to stream
- lift unchecked fun1
- lift checked fun1
[config] distribution management