Request for support for META object

[cnolewajka]

As per definition of meta object:
http://jsonapi.org/format/#document-meta

it would be nice to have support for meta object for resources: (resource and relationships)
http://jsonapi.org/format/#document-resource-objects

top level:
http://jsonapi.org/format/#document-top-level

resource identifier objects:
http://jsonapi.org/format/#document-resource-identifier-objects

links:
http://jsonapi.org/format/#document-links