Release 1.1.0

Adds Qt & Qwt graphical widgets
 - scatterplot
 - realplot
 - complexplot
 - waterfallplot
Adds liquid-dsp support and components
 - ofdm mod/demod
 - polyphase filterbank synthesizer/channelizer
Adds RtlSDR component
Adds Spectrogram component
Adds socket and file utilities