new eclass and portage category: octave-forge.eclass and dev-octave

Dear All,

The sci herd would like to propose the addition of a new
octave-forge.eclass as well as a new portage category 
dev-octave to house new octave-forge ebuilds.

Background:
-----------

GNU octave [1] is a high level language and computing environment aimed 
at numerical computations. octave-forge [2] provides a collection of 
extensions for, e.g., image processing, bioinformatics, etc., to the octave 
core package. In the past, the octave-forge package extending the octave-2* 
core was a monolithic build and is currently available in portage as 
sci-mathematics/octave-forge. For the newly released octave-3* core, 
octave-forge has been split into a large number of individual packages, 
each implementing a distinct functionality. In addition, the breath of the 
new octave-forge packages has been greatly expanded. Currently, there are 
more than 40 octave-forge-packages and the number is growing.

Current State of Affairs:
-------------------------

We have developed an octave-forge.eclass that handles the installation
of individual octave-forge packages as well as the management of the 
octave core-owned package database.
Both the octave-forge.eclass [3] as well as the individual
octave-forge ebuilds [4] are currently maintained in the scientific overlay
and have been tested over the past couple of months.