Move 404/500 up a dir and fix static files (Closes #57)

- put these in the default Django location
- fix the squirrel photos from not displaying (important)
2 jobs for 57-404Broken in 1 minute and 29 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
passed #1394
Go-py2.7

00:01:12

passed #1395
Go-py3.6

00:01:28

17.0%