- Decreased default building stealth to be the same as default planet stealth.
- Altered the Evacuation building so that it requires a TargetPopulation of greater than 1, not a current Population.

git-svn-id: https://freeorion.svn.sourceforge.net/svnroot/freeorion/trunk@5685 dbd5520b-6a0a-0410-a553-f54834df5b05
Merge remote-tracking branch 'svn-mirror/master'