update to match python standards, add health bar progress
CreateBossDisplayCountdown/CreateBossDisplayCountdown.py

* update code to match PEP8 and other Python standards
* add an option to change the progress of the health bar when using the display option
fix small mistake, avoid using keywords as variables
CreateBossDisplayCountdown/CreateBossDisplayCountdown.py

* fix a mistake at line 77: remove "not"
* replaced type with cirquitType and signType