NiSkinPartition unknowns removed

@neomonkeus @skyfox69 @jonwd7 @Ghostwalker71 @throttlekitty @nexustheru @amorilia
I have found a strange additions at the end of NiSkinPartition block definition. There is notice:
```
<!-- related to the file posted in tracker item #3117836:
            http://sourceforge.net/tracker/?func=detail&aid=3117836&group_id=149157&atid=776343 -->
```
followed by 7 lines of added unknowns conditioned only for nifs Version = 10.2.0.0 and UserVersion = 1. There is also added a compound `SkinPartitionUnknownItem1`.
Yesterday I have got sample nifs from Blood Bowl game which are precisely of that Version and UserVersion and these unknowns causes error on nif load - **these unknowns should not be there**. Without these lines, nifs from Blood Bowl game are loading ok.
* Does anybody know anything about that mentioned *tracker item #3117836* on sourceforge? That link don't works for me - it requires login into SourceForge account.
* Is it possible to get nif file(s) on which these unknowns was added to nif.xml?

For now I have uncommented them out as it is possible that these unknowns are valid for some nif versions - maybe there are only bad version/user version numbers in conditions.