1.0.2

- Revert 1.0.1 changes, still store code in Session, `Rails.cache` not a not place in difference environments.
  for exampe: Not enable cache, File cache will have bug.
- Give a warning when user use CookieStore.

1.0.1
-----

## Security Notes

- Fix Session replay secure issue that when Rails application use CookieStore.


1.0.0
-----

- Adjust to avoid lighter colors.
- Avoid continuous chars have same color.
- Use same color for each chars in :black_white mode.

0.5.1
-----

- Make sure it will render image when ImageMagick stderr have warning messages. (#26)

0.5.0
-----

- Fix cache with Rails 5.

0.4.5
-----

- Removed `posix-spawn` dependency, used open3 instead (core funciontality), JRuby compatible (#24)

0.4.4
-----

- Remove deprecated `width`, `height` config.
- Delete session key after verify (#23).
- Lighter text color, improve style.

0.4.2
-----

- Fix NoMethodError bug when params[:_rucaptha] is nil.

0.4.1
-----

- Add error message to resource when captcha code expired.

0.4.0
-----

- Add `config.colorize` option, to allow use black text theme.

0.3.3
-----

- Add `config.expires_in` to allow change captcha code expire time.

0.3.2.1
-------

- Add Windows development env support.

0.3.2
-----

- Make better render positions;
- Trim blank space.

0.3.1
-----

- More complex Image render: compact text, strong lines, +/-5 rotate...
- [DEPRECATION] config.width, config.height removed, use config.font_size.
- Fix the render position in difference font sizes.
- Fix input field type, and disable autocorrect, autocapitalize, and limit maxlength with char length;

0.2.5
-----

- Add `session[:_rucaptcha]` expire time, for protect Rails CookieSession Replay Attack.
- Captcha input field disable autocomplete, and set field type as `email` for shown correct keyboard on mobile view.

0.2.3
-----

- It will raise error when call ImageMagick failed.

0.2.2
-----

- Added locale for pt-BR language; @ramirovjr

0.2.1
-----

- Fix issue when cache dir not exist.

0.2.0
-----

- Added file cache, can setup how many images you want generate by `config.cache_limit`,
  RuCaptcha will use cache for next requests.
  When you restart Rails processes it will generate new again and clean the old caches.

0.1.4
-----

- Fix `verify_rucaptcha?` logic in somecase.
- Locales fixed.

0.1.3
-----

- `zh-TW` translate file fixed.
- Use xxx_url to fix bad captcha URL for `config.action_controller.asset_host` enabled case.

0.1.2
-----

- No case sensitive;
- Export config.implode;
- Improve image color and style;
- Don't generate chars in 'l,o,0,1'.
- Render lower case chars on image.

0.1.1
-----

- Include default validation I18n messages (en, zh-CN, zh-TW).

0.1.0
-----

- First release.