[Rivet] Doxygen for plugins

[David Yallup]

Dear Rivet authors,

This might be me being dense but I can't find the source code in doxygen 
for the analysis plugins on the hepforge site any more? I used to just 
go here

https://rivet.hepforge.org/code/dev/files.html

But I can't seem to find them, have they been moved/gone missing?

Cheers,

David