fix typo in package name, fix wrong license

setup.py

@@ -3,12 +3,12 @@
 from setuptools import setup
 
 setup(
-    name='camanager',
+    name='ca_manager',
     version='0.1',
     description='shell interface for certification authority management',
     author='LILiK',
     url='https://github.com/LILiK-117bis/ca_manager',
-    license='MIT',
+    license='GPL3',
     packages=['ca_manager'],
     install_requires=[
         'peewee',