checkpointing first work
checkpointing value build tests
adding pipelines
dropping checked exception from initializer
checkpointing structural errors
adding detection of duplicate fields
moving top type into standalon enum; adding structure check to default value builder
checkpointing before starting actual impl of cast reactor
checkpointing path track tests
checkpointing first cast impl (works for String but with some things stubbed out)
checkpointing primitive type work
checkpointing work on mingle core types
adding enum atomic cast
cast reactor tests pass
more cast work; all tests pass and old castValue() is gone
remove some dead code
checkpointing first definition of field order tests (no impls yet)
fixing some testing errors