#52 license file is outdated

[gil]

Hi,
latest source archive (1.13, also in Your git and svn repositories) contains a outdated license file.
Report this address
59 Temple Place, Suite 330, Cambridge, MA 02111-1307
but should be [1]
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301

Please, update LICENSE.txt file.

Thanks in advance

[1] https://www.gnu.org/licenses/gpl-2.0.txt