[Rivet] Plugin Projections

[Hendrik Hoeth]

Thus spake Leif Lönnblad (leif.lonnblad at thep.lu.se):

> Isn't there is a potential problem if you want to use the same
> projection in more than one analysis module?

You can put all your plugin analyses in the same .so to avoid this
trouble. Since plugin projections only make sense for plugin analyses,
that shouldn't be a problem.

-- 
The minimum number of planes one should own is one. The correct number
is n+1, where n is the number of planes currently owned. This equation
may also be re-written as s-1, where s is the number of planes owned
that would result in separation from your partner.       -- Veluminati