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vol2bird 0.5.0

fix branch vol2bird

corrected printed messages on scan numbers, to make them consistent w…

…ith ODIM scan numbering

added vcp attribute for NEXRAD

added check that executable and shared library match

moved dealiasing parameters to constant.h

options to enable consecutive single-pol and dual-pol rain filtering

bugfixes and automatic ignoring of low Nyquist velocity scans