It seems we weren't including stdint.h on Windows by mistake. Likely we
were getting it anywy from some other header, but it sounds like that
got changed in newer versions of MinGW and either way we shouldn't rely
on that.
Being that we include stdint.h on all platforms, I also changed os.h to
always use these types when defining the `int32` and friends sized
types. Ideally we get rid of those defines in the future but we can at
least use the stdint.h types going forward (as we already have).
This adds MIDI support to the language as a new unstable feature. There
are two new metacommands that come with this:
$Unstable: Midi
$MidiSoundFont: [Default|"filename"]
The $Unstable command is required to be able to use any of the other
commands, and just signifies that this is not a full part of the
language yet and may change in breaking ways before the API is
finalized.
The $MidiSoundFont command enables MIDI support in the compiled program,
and also specifies what sound font to use to play MIDI files. "Default"
will make use of the soundfont placed at
'./internal/support/default_soundfont.sf2', and otherwise a filename can
be specified to use any soundfont wanted.
In either case, the selected sound font is compiled into the executable
and then loaded at runtime.
Fixes: #115
This moves a lot of the preprocessor flags for what compiler/platform
we're using into a libqb-common.h header inside the libqb/include
folder. This gets included at the top of every libqb .cpp file, and is
intended to be fairly small, providing only necessary things like
_WIN32_WINNT (which needs to be defined before including <windows.h> or
friends).
