Add script for automatic papers download

   virtualenv --python=2.7 py
   source py/bin/activate
   pip install -r requirements.txt
   python download.py

download.py

@@ -0,0 +1,52 @@
+import os
+import urllib2
+import mistune
+import bs4 as BeautifulSoup
+
+def download_pdf(link, location, name):
+	try:
+	    response = urllib2.urlopen(link)
+	    file = open(os.path.join(location, name), 'w')
+	    file.write(response.read())
+	    file.close()
+	except urllib2.HTTPError:
+		print('>>> Error 404: cannot be downloaded!\n')    
+
+def clean_pdf_link(link):
+	if 'arxiv' in link:
+		link = link.replace('abs', 'pdf')	
+	return link
+
+def clean_header(text):
+	return text.replace(' ', '_').replace('/', '_')	   
+
+if __name__ == '__main__':
+
+	with open('README.md') as readme:
+		readme_html = mistune.markdown(readme.read())
+		readme_soup = BeautifulSoup.BeautifulSoup(readme_html, "html.parser")
+
+	point = readme_soup.find_all('h1')[1]
+
+	while point is not None:
+		if point.name == 'h1':
+			level1_directory = os.path.join('pdfs', clean_header(point.text))
+			os.makedirs(level1_directory)
+			print('\n'.join((point.text, "+" * len(point.text), "")))
+
+		elif point.name == 'h2':
+			current_directory = os.path.join(level1_directory, clean_header(point.text))
+			os.mkdir(current_directory)
+			print('\n'.join((point.text, "+" * len(point.text), "")))
+
+		elif point.name == 'p':
+			link = clean_pdf_link(point.find('a').attrs['href'])
+			extension = os.path.splitext(link)[1][1:]
+			name = point.text.split('[' + extension + ']')[0].replace('.', '').replace('/', '_')
+			if link is not None:
+				print(name + ' (' + link + ')')
+				download_pdf(link, current_directory, '.'.join((name, extension)))
+
+		point = point.next_sibling			
+
+

requirements.txt

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+mistune>=0.7.2
+beautifulsoup4>=4.4.1