Adding first draft version of jabref-2.9.2 ebuild.

This version is loosely based on jabref-2.8.1.ebuild attached to bug 385751 on
bugs.gentoo.org.

Package-Manager: portage-2.2.0_alpha163
Added changes suggested by Christoph Junghans <ottxor@gentoo.org>.

Package-Manager: portage-2.2.0_alpha163