Implement some nicer looking graphics. WIP.
Merge branch 'master' into bettergfx

Conflicts:
	SpaceTrader/src/main/java/de/anderdonau/spacetrader/NavigationChart.java
ShortRange and Galactic Chart look much nicer and waste less screen space.
Merge branch 'master' into bettergfx
Merge master and fix casts.
Correctly and better handle Back button.
Merge branch 'master' into bettergfx
Add Option to enable experimental Better Graphics.
Add some nice looking bitmaps for planets in non-experimental graphic mode.
Remove obsolete code.
Update version to 1.2.9
update to v1.2.9