Multiple song support, Lua/LOVE fixes
Squashed commit of the following:

commit 75de6c22b8ee08977418ed3155d2d815a8fec549
Author: MrEricSir <eric.gregory@bittorrent.com>
Date:   Sun Apr 13 15:16:50 2014 -0700

    Fixed non-MSVC build issue

commit d0782fac5027e6e777bb6fa60ad0e0a5d9a63209
Author: MrEricSir <eric.gregory@bittorrent.com>
Date:   Sun Apr 13 14:20:24 2014 -0700

    Fixed typedefs to compile on VC++ 2010

commit 6ffc85a8592beff1e0cccba5f5133ca7c0886384
Merge: 9bf199a dedec56
Author: hryx <codroid@gmail.com>
Date:   Sat Apr 12 17:09:53 2014 -0700

    Merge branch 'issue-59' of https://github.com/MrEricSir/Modipulate into issue-59

commit 9bf199a4eb5891e22abc7ad7589a137fecf7355b
Author: hryx <codroid@gmail.com>
Date:   Sat Apr 12 17:06:44 2014 -0700

    Updated libopenmpt branch to compile on OS X.
    - Link "iconv"
    - Nested MSVC #ifdefs instead of using && op
    - Include sys/time.h instead of sys/timex.h
Merge branch 'master' into issue-46
Polishing up multi-song
Added volume support to multi-song
Merge pull request #66 from MrEricSir/issue-46

Play more than one song at once -- Issue 46