try to manage booxtream download limits

[eshellman]

decrement the counts of booxtream so that server will refressh properly; currently, there's a timout generated when send to kindle tries to get an expired file:
Traceback (most recent call last):
File "/opt/regluit/ENV/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 111, in get_response
response = callback(request, callback_args, *callback_kwargs)
File "/opt/regluit/ENV/local/lib/python2.7/site-packages/django/views/decorators/http.py", line 41, in inner
return func(request, args, *kwargs)
File "/opt/regluit/ENV/local/lib/python2.7/site-packages/django/views/decorators/csrf.py", line 77, in wrapped_view
return view_func(args, *kwargs)
File "/opt/regluit/frontend/views.py", line 2822, in send_to_kindle
filehandle = urllib.urlopen(ebook_url)
File "/usr/lib/python2.7/urllib.py", line 84, in urlopen
return opener.open(url)
File "/usr/lib/python2.7/urllib.py", line 205, in open
return getattr(self, name)(url)
File "/usr/lib/python2.7/urllib.py", line 342, in open_http
h.endheaders(data)
File "/usr/lib/python2.7/httplib.py", line 951, in endheaders
self._send_output(message_body)
File "/usr/lib/python2.7/httplib.py", line 811, in _send_output
self.send(msg)
File "/usr/lib/python2.7/httplib.py", line 773, in send
self.connect()
File "/usr/lib/python2.7/httplib.py", line 754, in connect
self.timeout, self.source_address)
File "/usr/lib/python2.7/socket.py", line 571, in create_connection
raise err
IOError: [Errno socket error] [Errno 110] Connection timed out