Git conversion: Make reactos the root directory, move rosapps, rostests, wallpapers into modules, and delete rossubsys.
[LIBTIFF] - Update to version 4.0.7 CORE-12775 #resolve svn path=/trunk/; revision=73813
[LIBTIFF] - Use the official libtiff 4.0.3 def file to determine exported functions (instead of exporting everything in GCC builds, nothing in MSVC builds) - Remove unused ROS-diffs CORE-6898 CORE-12275 svn path=/trunk/; revision=73811
Update libjpeg from 6b to 8b. Add a new libpng 1.4.3 to main tree, linked dynamically, as libjpeg is, too. Add libtiff 3.9.4, linked dynamically, too. Enable both libs in wine/config.h which results in working png and tiff support in windowscodecs.dll svn path=/trunk/; revision=48014