Soapy sdrplay changes

Full Changelog: V0.3.1-alpha...V0.4.0-alpha

V0.3.1-alpha

Dropping input buffers needs to get the buffer first. Not just ignore the read which would force the selected input source to buffer overrun.

V0.2-alpha

uses flask.

V0.1.4-alpha

Downloadable links for snapshots
Input sources no longer tied to fft size
funcube dongle support, control on linux only though
soapy sdrplay working

V0.1.3-alpha

Missing logs directory in repo added

V0.1.2-alpha

Up/down conversion factors for tuned frequency.
Markers survive web browser page refresh.
Bug fixes for fps and marker times.
Pluto reads in fixed large blocks to divorce read from fft size.
Query supported (?) on source parameter to return helpful list of possible values (useful for multiple rtlsdr's).

V0.1.1-alpha

Bug fix for fps problems

v0.1-alpha

Initial working code
Works with pluto, rtlsdr, audio, file an socket