Pioneer spirit changes without maintenance mod

Pioneer spirit modification
- +1 movement for civilian units
- 50 less upkeep for roads
- 100% production for Harbors
- Fix to flavor for colonization (do we need to change these - I haven't
done it for the other policies I've tweaked..?)

DOES NOT contain the proposed change making civilian units maintenance
free as this can not be done without lua

Spread sheet updated