Merge pull request formio#349 from formio/fix-view-mode

Fixed the view mode by removing some unnecessary code.

Updated build.

Fixed issues with input mask routine where it would crash if not prov…

…ided.

Updated depdencies.

Version bump.

Merge pull request formio#324 from formio/fix-subform-urls

Fixed issues with the subform urls for nested forms.

Version bump.

Merge pull request formio#322 from formio/bootstrap-4-support

Bootstrap 4 support

Merge pull request formio#319 from formio/fix-ready-trigger

Fixed issue with ready promise not triggering for single form submiss…

Fixed the package.json to allow checkout of choices.js lib.