ni_nitdoc: Standardize doc method signatures

Signed-off-by: Stefan Lage <lagestfan@gmail.com>
ni_nitdoc: Public owner in MClass

Adding function to get the public owner of a class

Signed-off-by: Stefan Lage <lagestfan@gmail.com>
ni_nitdoc: inform class name and namespace

Insert first part of the content of a class page, its name and its
namespace

Signed-off-by: Stefan Lage <lagestfan@gmail.com>
ni_nitdoc: Linked the amodule to its module

Signed-off-by: Stefan Lage <lagestfan@gmail.com>
ni_nitdoc: Inform whoses modules are concerned in a class

Signed-off-by: Stefan Lage <lagestfan@gmail.com>
ni_nitdoc: namespace in mclassdef

Signed-off-by: Stefan Lage <lagestfan@gmail.com>