Added XCBGC macro and simple wrapper struct JB_XGC for converting xlib gcs to xcb gcs.
Added XCBGC macro and simple wrapper struct JB_XGC for converting xlib gcs to
xcb gcs.

jefbed/xstatus,jefbed/libjb,jefbed/xstatus,jefbed/libjb,jefbed/xstatus,jefbed/xstatus