an AI update

git-svn-id: https://freeorion.svn.sourceforge.net/svnroot/freeorion/trunk@5770 dbd5520b-6a0a-0410-a553-f54834df5b05
a change to AIInterface::UpdateMeterEstimates() so it doesn't interfere with AI invasions, & some additional AI invasion logging

git-svn-id: https://freeorion.svn.sourceforge.net/svnroot/freeorion/trunk@5771 dbd5520b-6a0a-0410-a553-f54834df5b05
Merge remote-tracking branch 'svn-mirror/master'