SysInfoDisplayWayland: Make Display adhere to our coding style.

cpplint.py was recently updated in depot_tools, and introduces a newer
style check for the indentation of items in a class declaration.
Merge pull request #300 from rakuco/SIDW-style-fix

SysInfoDisplayWayland: Make Display adhere to our coding style.
Bump version to 0.55
[Tizen] Add runtime deps needed by the Content API

In order to run Content API properly, the following packages needs to be installed

- media-data-sdk - creates the media database (/opt/usr/dbspace/.media.db)
- media-tumbnail-server - service to create tumbnails. Pulls is also media-server.