Results 3 issues of lltodoll

Add Matomo Support via Javascript/PHP Tracking method. Matomo will be configured via widget configuration. ![image](https://user-images.githubusercontent.com/12458872/131216196-060daf9e-c233-4703-994b-bbf546be8927.png) Trackingcode will be inserted at the bottom page.

Hi, i i have developed a small Matomo Widget in your Widget Site. Can i merge it in your master branch with a Pull Request? Thanks ![htmly_widget](https://user-images.githubusercontent.com/12458872/130933720-c20267a8-e15e-4baa-8359-8f10f2bfc426.jpg)

Hi, @ first, thanks for htmly. I think it's really good. I need a multi level categorization like: * Operation System ** Linux ** Windows ** ... It is possible?...