Added space world.
Updated gitignore
Added player moving and planets.
Added dialog box thingey.
Added planet labels.
Added ship sprite, modified cmake some.
Added planet sprite.
Added star images
Fixed star order.
Fixed planet sprite background.
Fixed sprites and Tank.
Centred player origin
Fixed ship sprite.
Added planet sprites.
Merge branch 'space' of github.com:DavidTruby/SpaceWorlds into space
Use c++11 instead of c++14
Removed image-in-contructor-thingy
Merge branch 'space' of github.com:Qualiaa/SpaceWorlds into space
Renamed asset files
Made showPlanetName private