@see https://github.com/thoughtbot/paperclip/commit/804b4edc1d8d7ca9865170e34f26da7d66f6d0d5#commitcomment-8497017

Including + now.

Many people have complained that the Media Type Spoof Detection does not
work properly for their files. While whitelisting is available for some
files, it's not a general solution. This option leaves the "secure by
default" of the media checker in place, but allows people to turn it off
completely if they so choose.

Column-specific options can be specified by using its name,
for example:

```
t.attachment :avatar, created_at: { index: true }
```

Fix: Typo in README

Update README.md

Added a security shield from Hakiri. It shows how secure gem dependencies are.

Update zh-TW.yml

Update zh-CN.yml

Add all sorts of Chinese translations

Use proper name for zh-TW locale.

Use proper name for zh-CN locale

Add Simplified Chinese (zh-CN) translation.

Add Traditional Chinese (zh-TW) translation.

Add explicit unlink to intermediate files from processors.

(thoughtbot/paperclip#1535)

Also, add integration tests for custom processor definition and unit
test for Paperclip.load_processor (thoughtbot/paperclip#1535).

... instead of `lib` of `lib/paperclip_processors`.
Fixes thoughtbot/paperclip#1534

Update docs badge in README

Describe workaround for false spoofing errors

Add a japanese translation file