Use tini as init process for graceful shutdown in Docker

Merge pull request #150 from RoboCup-SSL/feature/ball-model-parameters

Write ball model parameters to new messages in geometry

Merge pull request #146 from RoboCup-SSL/feature/docker

Add dockerfile and make grSim run without a display

Merge pull request #95 from kkimurak/update_links_in_docs

Update documents

Merge pull request #84 from RoboCup-SSL/fix-utf

Fix utf

Update README (minor)

Vesion 1.5 Beta 1