Merge branch 'master' of https://github.com/khoa-nd/TechLooper
Refine hisogram period detection
Merge branch 'master' of https://github.com/phuonghuynh/TechLooper
Add more histogram periods
Remove Highcharts that not used
Merge commit 'e67e55119686f24ae4247d7fb13b6aa99df79b7a'