iqpr: removing unused rxconfig() method to comply with new API
Merge branch 'master' of /home/jgaeddert/git/liquid-usrp
gmskframe: updating tx|rx to comply with new APIs
ofdmflexframe[tx|rx]: simplifying rate computation, default subcarrier allocation
ofdmflexframe[tx|rx]: changing default parameters
adding ascii spectrogram example (needs some work)
asgram: adding Hamming window, cleaning code somewhat
asgram: allowing fft size to be specified as command-line option
asgram: printing footer with center frequency
narrowband_tx: restructuring sample rate calculation
setting runtime to be nearly "forever" for negative time values
moving old ofdm_[tx|rx] examples to legacy
asgram: fixing bug with variable name
asgram: updating to comply with new API, more options