* moved rfi chamber development from ewanbarr/psrdada_cpp to MPIfR-BDG/psrdada_cpp

* added global OpenMP linker flag (temporary fix)

* RS sepctrometer running with copy overlap

* added code for writing output spectrum to disk

* added code for writing output spectrum to disk

* file writer running

* added CLI for rsspectrometer

* added FFT shift on output write

* fixed missing commas

* added FFT shifting on write

* added test for dc power

* typo resulting in excess spectra being accumulated

* added missing sychrnonise on proc stream

* fixed possible bug with inplace FFT when using advanced data layout

* typo fix

* added automatic read back of output and check for DC bin power in test

* automatic DC power test runs and passing

* generalised the spectrometer test

* fixed error where first channel block was not being processed

* changed logging level for some messages

* fixes for handling correct processing of channel blocks

* added network reorder on short2 to float2 conversion

* fixed BE to LE conversion in short2 to float2 cast

* added host to network order conversion in tests

* removed unused variable

* Added some doc strings to RSSpectrometer.cuh header