* StringExtensions.cs: Fixed bug

* FileContainer.cs: Added parent path to every children.

* GameFile.cs: Format is public. It makes no sense to be able to
  change it from type (by calling SetFormat) but not by Format type.

* DataReader.cs: Fixed bug.

* DataStream.cs: Fixed bugs.
Added absolute seek mode.

* Program.cs: Added temporaly NDS ROM test.

* Worker.cs: Added constructor from XML directly.

* FileSystem.cs: Remove constructor as it inherit Format class.

* Rom.cs: Updated to new code.