PlayList::LoadData: fix loading data
Seems that it was never work on Win32
Also unify for platforms, remove CStdString
[osx/mavericks] - ugly hacked fix for the mouse bug (mouse wasn't able to move over the full screen) - intermediated isolated hacked solution until new windowing is ready
Merge pull request #3517 from Memphiz/mousemavericks

[osx/mavericks] - ugly hacked fix for the mouse bug (mouse wasn't able t...
Merge pull request #3510 from Karlson2k/PlayList_fix_01

Fix loading data in CPlayList::LoadData