Added QuaZip library and dependencies

Added QuaZip and zlib source code projects.
Updated Readme and licensing

Added 3rd party licenses and updated readme file. Removed 7z.exe.
Modified project to build third-party libraries

Moved Archive viewer source code to its own project; archiveViewer.pro
now builds zlib, quazip and src.
Added the ImageSource pure abstract class

Intended to replace the ImageList classes, the ImageListFilter class,
and the PlayList class.