.conf -> .config translation changes
.conf -> .config translation changes

- No longer require a .conf
- Merge configuration in order of .conf -> schema defaults -> config.exs
  settings.
- **Breaking Change**: Transform functions now require one of two
  signatures, mapping/val, or mapping/val/accumulator. The accumulator
is provided if you have more than one setting pointing to the same
target setting. A good example use case is lager backend handlers
(console, file, etc).

bitwalker/conform