Merged Michaels Aesthetic changes into main repo

Feature #119
Merge branch 'develop' of github.com:CO600GOL/Game_of_life into origin/develop
Merge pull request #4 from CO600GOL/develop

Merge visual changes into my develop
Add a travis testing file
Merge branch 'origin/develop' into develop
Merge branch 'develop' of github.com:richlanc/Game_of_life into develop
Adjusted travis testing file

It seems the testing platform doesn't come with python3-tk installed.
Merge pull request #31 from richlanc/develop

Merge travis testing file into develop