pothos-library: conversions for buffer chunk
pothos-library: filling in the convert implementation
pothos-library: implement converters with templates
pothos-library: created unit tests for conversions
pothos-library: made convert api calls const
pothos-widgets: make Periodogram dtype independent
Merge branch 'master' into buffer_convert
pothos-widgets: make spectrogram type independent
pothos-widgets: make wave monitor type independent
Merge branch 'buffer_convert'