add libSquish logo

git-svn-id: http://libsquish.googlecode.com/svn/trunk@54 995b7d7e-cf50-0410-b6c9-9f4ebe303554
add missing qmake file to tgz

git-svn-id: http://libsquish.googlecode.com/svn/trunk@55 995b7d7e-cf50-0410-b6c9-9f4ebe303554