digital: formatting CMA code; adding get_ functions and renaming things for consistency.
digital: set number of samps per symbol for the equalizer. Also, explicitly set the initial taps of the adaptive filter to 0+j0
gr-digital: exposing accessors of CMA equalizer through swig and into GRC. Also added protection from exploding error calcs by clipping.
gr-digital: adding CMA equalizer to gr-digital. This replaces the gr_cma_equalizer_cc in gnuradio-core and uses the complex-in, complex-out, complex-taps version of the gr_adaptive_filter.