Fix indentation.
Add unescape() and unescape all strings returned to caller.
Update engine.fr.po
Disable error messages, which are meaningless for 0.18.
Don't activate passives during transformation process

This fixes a bug where a transformed passive power would activate before
clearing the hero's effects. The most common occurence of this bug was
War Cry's immunity effect blocking the speed penalty for the Stealth
transform.
Merge pull request #537 from stefanbeller/noerrors

Disable error messages, which are meaningless for 0.18.
Merge pull request #536 from cjsthompson/master

Update engine.fr.po
Merge pull request #534 from hean01/master

Added unescape functionality to MessageEngine.
Merge pull request #540 from dorkster/bugfixes

Don't activate passives during transformation process
Belarussian translation by Mikhail Karalevich
Finnish translation by Timo Sievanen