Merge branch '8psk' of https://github.com/trondeau/gnuradio into 8psk
digital: adding GRC block for LMS DD equalizer.
Moved generic psk and qam modulation into gr-digital.
gr-digital: adding dbpsk, dqpsk, and d8psk demodulators to gr-digital.
gr-digital: moved dbpsk, dqpsk, d8psk into the gr-digital space. Mods tested and working in GRC.
gr-digital: introducing a new blind equalizer based on minimizing the kurtosis. Does not work yet.
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.
gr-digital: adding GRC components for Costas loop.
gr-digital: adding a new top-level block for digital comms work.