scalaz Validation's monadic behaviour is deprecated

[newlandsvalley]

The code relies on this in a few places in for loops. Whereas this is fine in the scalaz release we use (7.0.0) it's been deprecated in 7.1.0. The easiest fix is probably to call the toDisjunction method, use the monadic methods on the disjunction (/) and then convert the result back to a Validation if needs be. Most annoying.

See https://groups.google.com/forum/#!msg/scalaz/IWuHC0nlVws/syRUkXJklWIJ
and https://groups.google.com/forum/#!topic/scalaz/Wnkdyhebo2w