core: added Boost append to fix a problem building static libraries and adds atomic and chrono libs to build.
support: added recipe for building log4cpp for GR logging
gnuradio image: adding support for GR static libraries and added pkgconfig options for controlport, orc, and staticlibs
conf: making use of GUI elements toggled through local.conf and defaulting to no GUI (no X11 or QT/QTGUI). The local.conf has commented out sections showing how to add these back.