Update README

README.md

 # python-mkp
+
+[![Build Status](https://travis-ci.org/tom-mi/python-mkp.svg?branch=master)](https://travis-ci.org/tom-mi/python-mkp)
+
+Pack or unpack [Check_MK](https://mathias-kettner.de/check_mk.html) mkp files.
+
+## Installation
+
+    pip install mkp
+  
+## Usage
+
+### Extract mkp package
+
+    import mkp
+  
+    package = mkp.load_file('foo-1.0.mkp')
+    print(package.info)
+    package.extract_files('path/to/somewhere')
+
+### Pack files to mkp package
+
+    import mkp
+    
+    info = {
+      'author': 'tom-mi',
+      'description': 'Test the system',
+      'download_url': 'http://example.com/',
+      'files': mkp.find_files('path/to/files'),
+      'name': 'test',
+      'title': 'Test',
+      'version': '1.0',
+      'version.min_required': '1.2.3',
+    }
+    mkp.pack_to_file(info, 'path/to/files', 'test-1.0.mkp')
+
+## License
+
+This software is licensed under GPLv2.