Added current version: sci-physics/lammps-20130708.

* Fixed bug in lammps to gentoo version string conversion. In bash arithmetic
  operations, a string literal with a leading "0" is interpreted in base 8.
* Added potentials, which were not installed in previous versions.
* Moved examples from /usr/share/doc/${PF} to /usr/share/lammps-${PF}.

Package-Manager: portage-2.2.0_alpha187
sci-physics/lammps: Fixed repoman warning.

Package-Manager: portage-2.2.0_alpha187