Visual Studio 2015 defines this in stdio now

Applets are now cleaned up in AppletUpdateEvent after calling their respective Update method.

The code now properly configures the process image to match the loaded
binary segments (code, rodata, data) instead of just blindly allocating
a large chunk of dummy memory.

Currently only the SWKBD is emulated, and there's currently no way to ask the user for input, so it always returns "Subv" as the text.

This isn't used, and there's no implementations of the member functions.

For the signed case, the shifts already remove the rest of the value, so
ANDing by the mask is redundant.

Fixes #913

This will help packaging tremendously, as a `make DESTDIR=… install` will now
put every file at their place (on Linux and related).

Also has a side-benefit of correcting access to the FPEXC register.