Update version and author info;
JPush API 3.0 python client initial code;
JPush API Client 3.0:
    1. Optimize test case;
	2. Param check;
JPush API 3.0 Client:
  1. Add override_msg_id option test case;
  2. Add send exception log;
JPush API 3.0 Client:
    Optimize the sample code;
Update override msgid test case;
Update override msgid test case;
Add all platform test case;
Make sure the test case encoding with utf-8;
Add content type http header;