ofdmframesync/example: removing unnecessary variables
flexframe[gen|sync]: compacting excess bandwidth, extending filter length
doc/framing: re-generating flexframe performance data with many more trials
build: adding more major developments to HISTORY
firpfbch/autotest: generating pseudo-random coefficients/data

  * rather than using standard C lib for random values, use msequence
  * this ensures repeatability across multiple platforms
  * should produce identical output on all machines (to machine
    precision)
  * probably need to create independent method for generating
    psuedo-random data sets (e.g. noise)
fft: modifying interface for simpler design

  * FFT 'kind' > FFT 'type'
  * FFT type included in main global header
  * includes both complex and real transforms
  * FFT_FORWARD > LIQUID_FFT_FORWARD
  * FFT_REVERSE > LIQUID_FFT_BACKWARD
  * preserve integer types for compatibility with FFTW
  * updated all examples, sandbox, test, benchmark programs
  * updated documentation to reflect new API
  * fixed memory leak bug with not freeing real-to-real transforms
fft: 'fft_autotest.h' > 'fft_runtest.h' (for consistency)
fft: updating fftbench program to comply with new API
Merge branch 'master' of ganymede
Merge branch 'master' of ssh://ganymede.ece.vt.edu:9505/home/jgaeddert/git/liquid-dsp
Merge branch 'fft-newapi'
framing/bpacketsync: freeing payload arrays (fixing memory leak)
build: adding configure option to override libfftw with internal

  * this is useful for testing with internal FFT
  * fftw seems to leak a decent amount of memory
  * fftw also seems to allocate a LOT of memory compared to internal ffts
nco/test: freeing nco objects in autotests (fixing memory leak)
gradsearch/test: reducing dimensionality to ensure convergence
gradsearch: dynamically adjusting delta to be approx |grad|/10,000
gradsearch/test: increasing tolerance
gradsearch/test: extending dimension of tests back to 6