Update spanish.php
Merge pull request #254 from CarlosPinedaT/patch-1

Update spanish.php
Update japanese.php

Translated Engish into Japanese.
Update japanese.php
Update japanese.php
Merge pull request #255 from ando-masaki/master

Update japanese.php
Update japanese.php

Changed translation more enable to understand Japanese
Merge pull request #258 from ando-masaki/master

Update japanese.php
add real_fields to check column status

add get_real_fields() function to check whether column is real or fake,
use to show on available field to be searched
adding read_field to check whether column is real

This used to avoid error unknown column on searching
update custom readme.txt

Add info about new function after last commit