firpfbch: improving synthesis example

  * generate multiple signals
  * channelizer up-converts each to synthesize composite signal
  * resulting spectrum of each is plotted
matrix: adding regular real transpose/multiply tests
matrix: adding real transpose/mul autotests
freqmodem/autotest: removing unused variable (rids compiler of warning)
filter/interp: adding method to compute output group delay
filter/decim: adding method to compute group delay, improving example
autotest: upgrading license
benchmark: updating license
doc: updating license
experimental: updating license
msresamp/example: adding analysis of output signal
resamp2: cleaning up interface description
resamp2: adding method to compute nominal filter delay
resamp2/decim-example: improving example

  * cccf > crcf
  * using new 'resamp2_crcf_get_delay()' method
  * plotting output time series
  * need to add command-line options
resamp2/decim-example: adding command-line options
resamp2/examples: cleaning up interp and decim examples
Merge branch 'master' into msresamp-dev
msresamp: giving more details to interface, cleaning example somewhat
resamp: adding method to get filter delay (filter semi-length)
Merge branch 'master' into msresamp-dev