minor changes to small and large traits, so hopefully they're more fun to use

- set naval capacity from soldier jobs from ground defense planning tech to +1 instead of +2
- the bellicose trait now gives +1 naval capacity from soldier jobs instead of +2
- set naval capacity from duelists to 1

- further adjustments to auto cannon graphics

- adjusted auto cannon graphics

- halved base ship upkeep
- restored diplo weight from fleet power to vanilla value (0.025)
- titan min alloys upgrade cost should now be correct