GSoC Refactor god objects weekly report

[V]

I am working on refactoring the class SwDoc into smaller parts. This 
week I finished the IDocumentSettingAccess implementation 
IDocumentSettingManager and improved the IDocumentDeviceAccess 
implementation a bit.
SwDoc now only contains the respective Get<Interface> method and all 
calls to the moved interface methods have been changed accordingly.

Valentin Kettner