gmskframe: adding readme to describe framing structure
Merge branch 'gmskframe-new' of ssh://ganymede.ece.vt.edu:9505/home/jgaeddert/git/liquid-dsp into gmskframe-new
firpfbch/sandbox: adding forward declaration of internal methods

  * sandbox is for testing pruposes so internal methods are not globally
    defined
  * adding forward declaration rids compiler of annoying warnings
  * helps clean up build process
Merge branch 'master' into gmskframe-new
symsync: adding symbol synchronizer autotest

  * generates pseudo-random symbols
  * interpolates with square-root nyquist filter
  * runs result through resampler
  * applies symbol timing recovery
  * matches all output symbols to inputs, compensating for delays
symsync: adding simpler symsync example, improving description
symsync/autotest: running different timing scenarios
symsync/autotest: adding rrrf class test suite
symsync: adding rate adjustment to help pull in sample rate offsets