math/octave-forge-octave_boost: New port.

A comprehensive open-source high performance processing package for
GNU Octave based on Boost C++ Libraries. Provides direct access to
Boost.Accumulators statistical accumulators for online computation of
count, covariance, density, error of mean, extended P^2 quantiles,
kurtosis, max/min, mean, median, moments, P^2 cumulative distribution,
P^2 quantile, peaks over threshold, POT quantile, POT tail mean,
skewness, sum, and tail statistics, as well as Boost.Chrono for
high-resolution timing and Boost.Date_Time for date and time
manipulation and Boost.Thread for multithreading support.