#MongoDB - simple pagination

##Summary DAO's method designed to receiving data from mongo database. There is ability to paginate data using only mongo query.

##Goal Your goal consist in write body of DAO's search method. Use /app/DAO/phoneDAO file for your solution. Searching operation is performing on collection which has structure:

{
    model: String,
    brand: String,
    state: String
}

Our DAO method accepts as parameter object whose properties could be skip and/or limit which type is number.

You need to fill our DAO method in accordance to guidelines:

• it should return promise,
• structure of returning data should have structure like: { results: [], total: int }, where results is found data and total is number of all elements in collection.

##Setup Type npm install before start.

Type grunt test to run unit tests. Note that you have to run mongod on your system before running rests.

Good luck!