Add content mapper implementation

[alexander-schranz]

When the content is saved the following things happens

0. Controller

• Specify which dimension attributes are for this request

1. DimensionFactory

• Load exist Dimensions by specified attributes (DimensionRepository)
• Create unlocalized Dimension when not exist
• Create localized Dimension when not exist and locale is given
• return a DimensionCollection object

2. ContentDimensionFactory

• Load exist ContentDimension by dimensionIds
• Create unlocalized ContentDimension when not exist
• Create localized ContentDimension when not exist
• Map given data to the localized and unlocalized ContentDimension
• return a ContentDimensionCollection object

3. ViewFactory

• Create a ContentView object by the specified ContentDimension
• Loop over all ContentDimension and call the mergers to merge there data on it
• return the ContentView object

4. ViewResolver

• Serialize the ViewResolver by a specified configuration
• Call the Resolvers to add there data
• return the Serialized Array object.