Add set(k, v) for Form and SearchForm
Add ref(ref) to SearchForm
Support repeatable form fields (for query)
Fix tests
Fix form vs search form

The API contains Forms, which can create SearchForms
Merge branch 'feature/improve-forms' into develop
Clean code
Search form now accepts results contains in an object

The API will return an object in order to handle pagination. This commit
allows to accept both result syntax in order to allow a soft transition.
Fix last commit
Merge branch 'develop'
Bump to 1.0.0.preview.4