add setup.py and blank requirements.txt + update usage info + fix exi…

…t statement

corona-archiver.py

@@ -221,8 +221,10 @@ def _write_data_entry(self, content, offset, filename):
     logging.basicConfig(level=logging.WARNING, format='%(asctime)s:%(levelname)-8s %(message)s')
 
     if len(sys.argv) != 4:
-        print "Usage: corona-archiver.py -p 'input_dir' 'output_file'"
-        exit(1)
+        print "Usage: "
+        print "\tpacking:\tcorona-archiver.py -p 'input_dir' 'output_file'"
+        print "\tunpacking:\tcorona-archiver.py -u 'input_file' 'output_dir'"
+        sys.exit(1)
 
     method = sys.argv[1]
     input = sys.argv[2]

setup.py

@@ -0,0 +1,13 @@
+#!/usr/bin/env python
+# -*- coding:utf-8 -*-
+from distutils.core import setup
+import py2exe
+
+setup(
+    console=['corona-archiver.py'],
+    name='CoronaArchiver',
+    version='1.0',
+    description='Corona archive file packer/unpacker',
+    author='0BuRner',
+    url='https://github.com/0BuRner/corona-archiver'
+)