This simple script downloads an article from the ArXiv and converts it into epub format to make it suitable for ebook readers. Usage is:
./download_arxiv_epub.py https://arxiv.org/abs/1306.0159
where you either pass the URL of the paper or only the ArXiv identifier (i.e. 1306.0159). The ebook version of the paper is then saved in the same directory as the script.