Bump vendored ember-validations to latest version

[sohara]

On master latest version is 1.0: https://github.com/dockyard/ember-validations/blob/master/VERSION

Perhaps it would be good update vendored version to latest release?

[feitian124]

we need remote validation but seems 1.0 still lack this feature.
@hysios

[hysios]

this vendor/ember-validations/dist/ember-validations.js file is lr-remote-validator version of branch, and add i18n support for uniqueness validator (see https://github.com/hysios/ember-validations/tree/lr-remote-validator), but early pull-request in pending, we fixed that & request again.