~ git clone https://github.com/alekseylovchikov/ch-download.git
~ cd ch-download
~ npm install
# from downloaded directory
~ node index.js -u course-url -e email -p password [-d dirname] [-l lessons]
# from downloaded directory
~ node index.js -u course-url [-d dirname] [-l lessons]
-e: email for login
-p: password for login
-u, --url: https://coursehunter.net/course_name
-d, --dir: download folder, default <course_name>
-l, --lessons: download only listed lessons, e.g.: "1-5, 7, 10, 12-15" or 3-7,9,11,15-20