avian2/jsonmerge — pull request #15 by birdsarah (2014-09-19 13:37:11+00:00)
Title: Allow versioning on referenced items.

I wanted to be able to do something like:
````
"properties": {
"item": {
"mergeStrategy": "version",
"$ref": "#/definitions/item"
}
````
but in descend, the mergeStrategy was getting thrown away if a ref was present.