1. make intl fields use [IntlValue] and [IntlValueInput] types
2. add isIntlData marker to fields storing intl data
3. only validate intl fields that are marked as required
4. remove all instance of `__typename` from documents in edit forms
- Added support for fields that have their own subschema
- The code flattens the subschema fields, so the path for `address: { street }`` becomes `'address.street'`
- Several places needed to be changed to properly support paths, so `currentValues[path]` becomes `get(currentValues, path)`
- In Form.getData(), replaced underscore's `pick` with lodash's `pick` which properly supports paths and returns a new object
- Fixed a bug in collection.getParameters that made it impossible to specify a `limit` with addView or addDefaultView
