Enable unicode rc support

This fixes #886 by enabling UTF-8 encoding for our resource files allowing the user to enter copyright symbols and such into the LateralGM game settings dialog. LGM already had the UTF-8 encoding so no other fixes are necessary.

This follows the same solution as a Code::Blocks project.
http://forums.codeblocks.org/index.php?topic=19354.0;wap2