Add new lens: Leica DG Nocticron 42.5mm F1.2 Asph. Power OIS.

git-svn-id: svn://dev.exiv2.org/svn@3227 b7c8b350-86e7-0310-a4b4-de8f6a8f16a3
Fix issue #944: Tokina lens name fixes. Thanks goes to Robert Rottmerhusen for explaining Tokina lens names.

git-svn-id: svn://dev.exiv2.org/svn@3228 b7c8b350-86e7-0310-a4b4-de8f6a8f16a3