Can't fill database with cards/events - getting 404 error

Hi, I am experimenting with the schoolido.lu code in a VM so that I can understand how it works and maybe (eventually) help contribute. Anyway I am following the steps in the Contributor's Guide. Everything is going well until the "Fill database with cards" step at which point the script crashes. It looks like it's having trouble trying to add the event `獲物は…君だよ!`

```
(env)vagrant@schoolidolu:~/SchoolIdolAPI$ python manage.py importcards
### Import card ids & stats from decaf wiki
Importing card # 1 ... Done
Importing card # 2 ... Done
Importing card # 3 ... Done
[...]
Importing card # 388 ... Done
Importing card # 389 ... Done
Importing card # 390 ... Done
### Import events from decaf wiki
Import event Score Match Round 21 ... Done
Import event image... Done
Import event Loving you! ... Done
Import event image... Done
Import event Medley Festival Round 7 ... Done
Import event image... Done
[...]
Import event Score Match Round 2 ... Done
Import event image... Done
Import event 獲物は…君だよ!... Done
Import event image...
Traceback (most recent call last):
File "manage.py", line 11, in
execute_from_command_line(sys.argv)
File "/home/vagrant/SchoolIdolAPI/env/local/lib/python2.7/site-packages/django
/core/management/__init__.py", line 385, in execute_from_command_line
utility.execute()
File "/home/vagrant/SchoolIdolAPI/env/local/lib/python2.7/site-packages/django
/core/management/__init__.py", line 377, in execute
self.fetch_command(subcommand).run_from_argv(self.arg)
File "/home/vagrant/SchoolIdolAPI/env/local/lib/python2.7/site-packages/django/core/management/base.py", line 288, in run_from_argv
self.execute(*args, **options.__dict__)
File "/home/vagrant/SchoolIdolAPI/env/local/lib/python2.7/site-packages/django/core/management/base.py", line 338, in execute
output = self.handle(*args, **options)
File "/home/vagrant/SchoolIdolAPI/api/management/commands/importcards.py", line 30, in handle
import_jp_events()
File "/home/vagrant/SchoolIdolAPI/api/management/commands/import_jp_events.py", line 51, in import_jp_events
f_event = urllib2.urlopen(url)
File "/usr/lib/python2.7/urllib2.py", line 127, in urlopen
return _opener.open(url, data, timeout)
File "/usr/lib/python2.7/urllib2.py", line 410, in open
response = meth(req, response)
File "/usr/lib/python2.7/urllib2.py", line 523, in http_response
'http', request, response, code, msg, hdrs)
File "/usr/lib/python2.7/urllib2.py", line 448, in error
return self._call_chain(*args)
File "/usr/lib/python2.7/urllib2.py", line 382, in _call_chain
result = func(*args)
File "/usr/lib/python2.7/urllib2.py", line 531, in http_error_default
raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
urllib2.HTTPError: HTTP Error 404: Not Found
```

`manage.py` supposedly has a `-v VERBOSITY` argument to increase verbosity but it does not seem to change the output at all (I tried 1, 2 and 3)

So I added my own debug print statement in `import_jp_events()` in `api/management/commands/import_jp_events.py`:

```
Import event Score Match Round 2 ... Done
Import event 獲物は…君だよ! ... Done
Import event image... URL IS http://decaf.kouhi.me/lovelive/index.php?title=%E
7%8D%B2%E7%89%A9%E3%81%AF%E2%80%A6%E5%90%9B%E3%81%A0%E3%82%88%21
Traceback (most recent call last):
File "manage.py", line 11, in
[...same error output as above...]
```

I tried going to that URL and it does in fact return a 404 page.

BTW this occurs whether or not I use `noimages`

Also why does it stop at card #390 when importing cards? Unless I'm mistaken, I'm pretty sure there are more cards in the game than that.

Start with api/management/commands/importcards.py and api/management/commands/import_jp_events.py, then run `python manage.py importcards` to reproduce the 404 for the named event. Inspect how the event image URL is built and compare it with the failing URL shown in the report. Done means the database import completes without this 404, including when image handling is enabled.

Written by the indexing model from the issue text.