Make Dynamic fields settable
Merge branch 'develop' into feature/issue-513-dynamic-model-fields-should-be-settable
Fix bug in DynamicDescriptor.set_value()
Custom validation, to_riak() and from_riak() for FieldWithSubtype's subfields
custom_validate() for Dynamic and ListOf fields
Merge branch 'develop' into feature/issue-513-dynamic-model-fields-should-be-settable
Tests for setting dynamic and listof fields
DynamicDescriptor needs custom value setting (.set_value())
Merge branch 'develop' into feature/issue-513-dynamic-model-fields-should-be-settable
Merge branch 'feature/issue-513-dynamic-model-fields-should-be-settable' into develop