deployd/deployd — pull request #252 by yoneal (2013-08-21 15:10:52+00:00)
Title: Added support for mongodb $addToSet but named its syntax to $addUnique

Fixed #140
Opted for `$addUnique` because it is much simpler than `$addToSet`.
Below is an example usage:
```
{
"persons": {
"$addUnique": ["me", "you"]
},
"colors": {
"$addUnique": "pink"
}
}
```