krylov matrix for gallery
cov.cpp unit test polished
Fix #360 - Remove at_i in favor of extract
missing include of arg.hpp in posmin and posmax
lauchli for gallery
lehmer for gallery
leslie for gallery
maximum in complex case was broken

In complex case maximum use a different ordering on the complex values
than the trivial one used by comparison operators (i.e. comparing real parts)
In fact it compare modulus and then lexically argument
This implies that the max reduction must use a starting value of 0 (not -inf)
because the comparison will begin by some abs(a0) > abs(init)
which will be false with abs(-inf)...

Maxinit is -inf for reals, but the overloding for complex is not included
because boos::simd has no complex. It must be however included somewhere:
for now it's there but we could find a better place than in a file where it is
not explicitely used.
spurious typename in non template in leslie.hpp
signed/unsigned with unwrap pb attempt of resolution
move maxinit.hpp include to container/maximum.hpp
lesp forgallery+correction to tridiag
Merge branch 'master' into integre