docs: Reviving Python manual.

I'd like to only produce a single manual, and the Sphinx docs take too
much manual labor to keep up-to-date. Still, there is a lot of useful
tools and classes only in Python that need to be exposed in a manual,
so this is the quickest way to get there.

This flattens the sphinx documentation structure so each component has
a <component>_blocks.rst where the actual GNU Radio blocks are managed
and a <component>.rst for any other non-block or Python-only code
(hier_block2, functions, and classes).

The new flattened file structure should make it easier to update, but
the index.rst should have some work done to make structure information
better.

Author: trondeau

docs/sphinx/source/analog.rst

@@ -0,0 +1,21 @@
+gnuradio.analog
+===============
+
+.. autoclass:: gnuradio.analog.cpm
+.. autoclass:: gnuradio.analog.squelch_base_cc
+.. autoclass:: gnuradio.analog.squelch_base_ff
+.. autoclass:: gnuradio.analog.am_demod_cf
+.. autoclass:: gnuradio.analog.demod_10k0a3e_cf
+.. autoclass:: gnuradio.analog.fm_demod_cf
+.. autoclass:: gnuradio.analog.demod_20k0f3e_cf
+.. autoclass:: gnuradio.analog.demod_200kf3e_cf
+.. autoclass:: gnuradio.analog.fm_deemph
+.. autoclass:: gnuradio.analog.fm_preemph
+.. autoclass:: gnuradio.analog.nbfm_rx
+.. autoclass:: gnuradio.analog.nbfm_tx
+.. autoclass:: gnuradio.analog.ctcss_gen_f
+.. autoclass:: gnuradio.analog.standard_squelch
+.. autoclass:: gnuradio.analog.wfm_rcv_fmdet
+.. autoclass:: gnuradio.analog.wfm_rcv_pll
+.. autoclass:: gnuradio.analog.wfm_rcv
+.. autoclass:: gnuradio.analog.wfm_tx

docs/sphinx/source/analog/get_blocks.py

@@ -0,0 +1,40 @@
+gnuradio.analog
+===============
+
+.. automodule:: gnuradio.analog
+
+.. autoblock:: gnuradio.analog.agc2_cc
+.. autoblock:: gnuradio.analog.agc2_ff
+.. autoblock:: gnuradio.analog.agc3_cc
+.. autoblock:: gnuradio.analog.agc_cc
+.. autoblock:: gnuradio.analog.agc_ff
+.. autoblock:: gnuradio.analog.cpfsk_bc
+.. autoblock:: gnuradio.analog.ctcss_squelch_ff
+.. autoblock:: gnuradio.analog.dpll_bb
+.. autoblock:: gnuradio.analog.fastnoise_source_c
+.. autoblock:: gnuradio.analog.fastnoise_source_f
+.. autoblock:: gnuradio.analog.fastnoise_source_i
+.. autoblock:: gnuradio.analog.fastnoise_source_s
+.. autoblock:: gnuradio.analog.feedforward_agc_cc
+.. autoblock:: gnuradio.analog.fmdet_cf
+.. autoblock:: gnuradio.analog.frequency_modulator_fc
+.. autoblock:: gnuradio.analog.noise_source_c
+.. autoblock:: gnuradio.analog.noise_source_f
+.. autoblock:: gnuradio.analog.noise_source_i
+.. autoblock:: gnuradio.analog.noise_source_s
+.. autoblock:: gnuradio.analog.phase_modulator_fc
+.. autoblock:: gnuradio.analog.pll_carriertracking_cc
+.. autoblock:: gnuradio.analog.pll_freqdet_cf
+.. autoblock:: gnuradio.analog.pll_refout_cc
+.. autoblock:: gnuradio.analog.probe_avg_mag_sqrd_c
+.. autoblock:: gnuradio.analog.probe_avg_mag_sqrd_cf
+.. autoblock:: gnuradio.analog.probe_avg_mag_sqrd_f
+.. autoblock:: gnuradio.analog.pwr_squelch_cc
+.. autoblock:: gnuradio.analog.pwr_squelch_ff
+.. autoblock:: gnuradio.analog.quadrature_demod_cf
+.. autoblock:: gnuradio.analog.rail_ff
+.. autoblock:: gnuradio.analog.sig_source_c
+.. autoblock:: gnuradio.analog.sig_source_f
+.. autoblock:: gnuradio.analog.sig_source_i
+.. autoblock:: gnuradio.analog.sig_source_s
+.. autoblock:: gnuradio.analog.simple_squelch_cc