TryGhost/Ghost — pull request #3124 by jaswilli (2014-06-26 15:31:13+00:00)
Title: Fix server-side validation

Closes #3122
-Fix validation so that all values are validated instead
of just values that evaluate to true.
-Ensure validation methods consistently return promises
and switch error handling from try/catch to promise.catch
to get rid of unhandled rejection warnings.
-Distinguish between null and empty string database values in
validation.
-Add 0 and 1 to list of acceptable values in boolean validation.
-Add validation check for empty strings on some fields that
should not contain empty strings.