Revert "don't auto-target unarmed buildings in ra mod"

This reverts commit c74fa903053efd06a79ed4d4aaea53ecdb1f4161
also revert AutoTargetIgnore: for all buildings in cnc
also revert AutoTargetIgnore: for all buildings in d2k
RA map - doughnut - made trees for bottom teams more even towards middile. Added missing fences top.
RA Sniper HP reduced from 200 to 80.
Iron Curtain duration increased from 15 to 20. Chronosphere duration decreased from 30 to 20.
MRJ missile deflection range increased from 3 to 4.
Increase repair of mechanic from 13 to 20. Increase light armour multiplier percentage from 40% to 100%.
Merge pull request #3488 from cjshmyr/maps

RA map - doughnut - made trees for bottom teams more even towards middil...
Merge pull request #3486 from pchote/misc-ui-polish

Misc UI polish.
Merge pull request #3487 from pchote/server-client-fix

Prevent handshake spoofing of Client data.
Merge pull request #3489 from ScottNZ/balance

More RA balance work
Merge pull request #3467 from Mailaender/autotarget-bots

AutoTarget unarmed buildings again to help AI crush it's enemy
Updated changelog with key changes from release-20130514...04ae39.