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+Changelog
+=========
+
+Version 0.3
+-------------
+* add function `get_serialnumber` (return device serial number)
+* add function `delete_user` (delete specific user by uid)
+* add function `clear_data` (format device)
+* add function `get_attendance` (get all attendance records)
+* add function `clear_attendance` (clear all attendance records)
+
+Version 0.2
+-------------
+* add basic function and program fundamental
+* configure pypi
+* configure travis-ci integration
+
+Version 0.1
+-------------
+* project initialization