bin: install-user: serf: fix build
bin: install-user: subversion: fix signature verification
.config/awesome.*: disable Win+X shortcut
.xbindkeysrc: remap Win+C to Win+F8
.xbindkeysrc: add Win+Z, Win+X, Win+C, Win+V, Win+B bindings for cmus
.vimrc: add bundle 'scrooloose/nerdcommenter'