Added gallery screenshot and improved README.md
-rw-r--r-- 1057 .gitignore
-rw-r--r-- 1078 LICENSE
-rw-r--r-- 1235 README.md
-rw-r--r-- 3819 async-upload.py
-rw-r--r-- 58 requirements.txt
-rw-r--r-- 395455 screenshot.png