kobuki_core: 0.5.4-0 in 'hydro/distribution.yaml' [bloom]

Increasing version of package(s) in repository `kobuki_core` to `0.5.4-0`:

- distro file: `hydro/distribution.yaml`
- bloom version: `0.5.9`
- previous version for package: `0.5.3-0`

## kobuki_core

- No changes

## kobuki_dock_drive

- No changes

## kobuki_driver

```
* Fixed typos.
* Fixed typos
* updating hydro-devel to hydro
* kobuki_driver : Updated doxygen. Issue #10 <https://github.com/yujinrobot/kobuki_core/issues/10>.
* kobuki_driver : Fixed a typo on doxygen.
* kobuki_driver : Updated doxygen document.
* kobuki_driver : Updated doxygen document.
* Contributors: Jihoon Lee, Younghun Ju
```

## kobuki_ftdi

```
* kobuki_ftdi : Updated doxygen document.
* Contributors: Younghun Ju
```