Put the src for the following archives in the "Libraries"-directory:

DevIL >= 1.6.7
zlib >= 1.2.3
jpeg-6b
lpng > 1.2.8
tiff -> 3.7.4
Unzip them all and remvove the version number from the dir name. Then 
move the files into the each correspondig "*-src" directory (created by Subversion). 
