Fixed preexisting errors to do initial run of application
Orbital Body (+sun) images for systems
Changed drawing of things. Made drawable an abstract class.
Fixed drawing of Sectors.
Game is proof of concept  : just use to explore randomly generated galaxys. When we switch to Stage -> Actor this will be rewritten.
Fixing sector to Scene2d.
Messing with sector and planet
Merge remote-tracking branch 'origin/GalaxySystemViewDev' into GalaxySystemViewDev

Conflicts:
	core/src/se300/destinytactics/mapgen/Sector.java
Fixt Sector merge conflix
Changed game to Scene2d.
no message
Merge remote-tracking branch 'origin/GalaxySystemViewDev' into GalaxySystemViewDev
Fixed sectors to draw with Scene2d (for real this time).
Merge remote-tracking branch 'origin/GalaxySystemViewDev' into GalaxySystemViewDev
Added sun graphic for display on galaxy screen
Added background to galaxy.
Merge remote-tracking branch 'origin/GalaxySystemViewDev' into GalaxySystemViewDev
Added background
Merge remote-tracking branch 'origin/GalaxySystemViewDev' into GalaxySystemViewDev
Changed sun to new sun graphic.