Merge pull request #78 from dalerank/master

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fixes for gcc
fix typos
fix arrows
beautify code
Merge pull request #81 from dalerank/master

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WidgetDeleter add. WindowStackMessages fixed.
City now emit signal about accessroad warning.
WorkerHunter add to walkermanager.
add walkertype WT_PREFECT.
Factory::goodStore move to implementation.
Picture::get_width/heigth rename
ServiceWalker refactoring
Walker refactoring
infobox manager add infobox for engineer post