Provide (and share) an Oomph setup file for installing the developer version

[AlexisDrogoul]

A very interesting feature of Eclipse (appeared in Luna, I think) is the Oomph project, which aims at simplifying the installation of Eclipse itself, especially for installing specific configurations (incl. plugins, preferences, setup of Git repositories automatically, etc.). The definition files (also called setup files) can also be shared among developers (in the Git repository), so that people just have run the new Eclipse installer, point to the file, and everything will be setup for them. An added benefit is that every modification to this file is propagated among the developers, who can then directly update their configuration (for instance if a new version of XText is required, etc.).

The details about Oomph can be found here: http://projects.eclipse.org/projects/tools.oomph and there are lots of tutorials available for creating specific configurations (see http://wiki.eclipse.org/Eclipse_Installer).

It would be worth, also, to check whether this installer could not be used to install and update Gama as well, by the way.

(moved from https://github.com/gama-platform/gama/issues/1559)