WiiFlow compatibility missing? (with pull request)

[saulfabregwiivc]

Hi there @emukidid

Thanks for your great work with Wii64, i saw that you finally released Wii64 1.3, but there's still one thing you missed: compatibility with WiiFlow as a plugin for load automatically N64 games.

I know Not64 has this compatibility via its own arguments of "rompath" and "SkipMenu" but i think this modification i try to add to Wii64 for use with simple arguments for autoload a rom via arguments, making it compatible with Wiiflow and won't affect any other arguments (FBTex, ScalePitch, etc.)
Wii64 had arguments compatibility for autoload roms but only on @FIX94's recompile of Wii64 1.2 (http://github.com/FIX94/Wii64/releases), but not in official one made by you.

See this pending pull request from me for details: #83

Can you review my code addition and make a test build of Wii64 1.3 with that code i'm implementing?

Thanks a lot, @saulfabregwiivc