subtle 0.9.2573 released

This release contains major rewrites and fixes of various parts like handling of close/destroy events, EWMH states and size hints. Colors have been cleaned up and icons are now possible either in the panel as standalone, in view buttons or as sole view buttons. On multihead, XRandR is now default and xinerama is only used in case XRandR doesn't work or has been disabled via commandline. (for nvidia) There were only subtle changes in subtlext and small changes of the output of the list and config command in sur. For debugging purpose, subtle uses message levels now.