SaveGame Manager GX r123

by dj_skual, Giantpune
Install/Extract saved game files. Based on Waninkoko's SaveGame Manager.

CHANGELOG
=========
* Fixed a widescreen problem with icons in List mode ( Issue 156 )
* Fixed a problem with the Icon mode for emulated nand ( Issue 157 )
* Fixed a problem with Warning message refresh in manage windows
* Fixed bug in aif and wav decoding (thx dimok)
* Added EmuSaveWindow to manage your saves from your emulated nand path
* Added "Block Manage Emulated Nand" to Parental Control Settings Menu
* Added InstallEmu() to install saves from your emulated nand path to the real
nand (of course, the save need to already exist on the real nand)
* Added ExtractEmu() to extract saves from your emulated nand path to your
storage device
* Added fonction to install a data.bin in your emulated nand path
* Added fonction to install a save from your real nand to your emulated nand
path
* Added fonction to install a save from your storage device to your emulated
nand path
* Fixed Linux compile errors
* Changed font character texture to I4 which uses half as much memory (less
cache memory) (thx dimok)

Branches:
* Updated libpng to 1.5.9
* Updated libjpeg to 8d
* Updated zlib to 1.2.6
* Updated libgd to SVN and make it use interlace on libpng (thx dimok)

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