Change  ArchiveRar::dateFromDos to implementation found in libunrar.
*ArchiveRar::readFile : Use QByteArray.data() instead of dynamic char* array for buffer.  * PictureLoader::getImageFromArchive : don't initialize QByteArray with new, pass it by reference.
* Move icons to "res" folder and misc files to "assets" folder
* Upgraded unrar library to version 5.0.3.  * Added unrar library for 64bit Windows and Linux .  * Automatically copy unrar library to build directory.