[Paraview] req: please exclude userguide from binary installers

[Gena Bug]

Hi!

Paraview is developed fast and all new features are great! That's why I 
download all new releases including RC. However, installation binaries 
are huge because they include UserGuide in pdf. Excluding it decreases 
archive size from 379 Mb to 204 Mb (almost twice!) I know, most of you 
have high-speed Internet and you don't see the difference, however I'm 
not so lucky... It'll be great for me if developers exclude userguide 
from the installation binaries.

P.S. Userguide included in "Data, Documentation, and Tutorials" type of 
download, so there is also a kind of duplication.