Bootstrap
Special attention is paid to the Bootstrap folder. Its detailed structure, file and folder description, and usage instructions are represented on the official framework website by following this link.

Changes in an update from 12 May 2017
There were made no changes in the Bootstrap folder in the update. It has its original structure and looks. But there are 2 exceptions:
- Bootstrap\scss\_custom.scss file. It includes changes for variables that were required by the template design.
- app\sass\theme-styles\_bootstrap-customization.scss file. It includes changes in stylesheet for standard form elements, headings, paragraphs, lists etc.