Add ScrollX and ScrollY to mouse()

The Duktape library invokes a function, GetSystemTimePreciseAsFileTime,
that was added in Win8.

This simply changes the build configuration to use a less precise
function. Hopefully this doesn't impact timing in any games.

Fix missing entry point error on Windows 7

Revert "Fix missing entry point error on Windows 7"

Fix SDL cursors memory leak

…some compilation fixes in file_dialog.c

…g, no matter what layout you use

Add 3ds compilation

…rebase