setup.py: fixup license to match the repository

setup.py

@@ -7,7 +7,6 @@ setup(
     description='Using Trezor as hardware SSH agent',
     author='Roman Zeyde',
     author_email='roman.zeyde@gmail.com',
-    license='MIT',
     url='http://github.com/romanz/trezor-agent',
     packages=['trezor_agent', 'trezor_agent.trezor'],
     install_requires=['ecdsa>=0.13', 'ed25519>=1.4', 'Cython>=0.23.4', 'trezor>=0.6.6'],
@@ -16,7 +15,7 @@ setup(
         'Development Status :: 3 - Alpha',
         'Intended Audience :: Developers',
         'Intended Audience :: Information Technology',
-        'License :: OSI Approved :: MIT License',
+        'License :: OSI Approved :: GNU Lesser General Public License v3 (LGPLv3)',
         'Operating System :: POSIX',
         'Programming Language :: Python :: 2.7',
         'Topic :: Software Development :: Libraries :: Python Modules',