+ fix some bugs, the annotation starts from 0 now, and each sleep state's end will be same with the next state's start.
+ In Start-End mode, when there is already a end line, click within a second of the end line, the start line will be automatically placed in the position of the last end line.
+ Publish 0.1.2, which can be download by `pip install misleep` directly, and also can be update by `pip install --upgrade misleep`.