Migrate hue manager into rocon_devices

[jihoonl]

hue_manager provides generic interface to control a multiple hues. It would be better to stay together with rocon_hue.

https://github.com/robotics-in-concert/rocon_demos/tree/office_concert/office_hue_manager

[jihoonl]

Also update set_color to use message format rather than string.

[dwlee]

I moved it from office concert and crteated new message for controlling hue color

• 4e0ea2d
• SetColor