Fix for issue #9: Change the Codepage of the process to UTF-8

[OetkenPurveyorOfCode]

To support loading filenames with unicode characters on windows, declare UTF-8 support in the manifest file.

[rexim]

@OetkenPurveyorOfCode oh! It even fixes the problem when compiled with MinGW and ran with Wine. Nice! :+1: Thank you very much!