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GNU LESSER GENERAL PUBLIC LICENSE1Version 2.1, February 199923Copyright (C) 1991, 1999 Free Software Foundation, Inc.451 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA5Everyone is permitted to copy and distribute verbatim copies6of this license document, but changing it is not allowed.78[This is the first released version of the Lesser GPL. It also counts9as the successor of the GNU Library Public License, version 2, hence10the version number 2.1.]1112Preamble1314The licenses for most software are designed to take away your15freedom to share and change it. By contrast, the GNU General Public16Licenses are intended to guarantee your freedom to share and change17free software--to make sure the software is free for all its users.1819This license, the Lesser General Public License, applies to some20specially designated software packages--typically libraries--of the21Free Software Foundation and other authors who decide to use it. 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