Removed 'not null' constraint on position fields.
treeb1c83f889f4de725c2722e96e247e507b8fcfff7
-rw-r--r-- 307 Rakefile
drwxr-xr-x - app
drwxr-xr-x - config
drwxr-xr-x - db
drwxr-xr-x - doc
drwxr-xr-x - extra
drwxr-xr-x - files
drwxr-xr-x - lang
drwxr-xr-x - lib
drwxr-xr-x - log
drwxr-xr-x - public
drwxr-xr-x - script
drwxr-xr-x - test
drwxr-xr-x - vendor