added a class to verify.py which extracts radar bins in the neighbourhood of a rain gage, added a corresponding example workflow in verify_example.py
added a class to verify.py which extracts radar bins in the neighbourhood of a rain gage,
added a corresponding example workflow in verify_example.py

wradlib/wradlib,kmuehlbauer/wradlib,heistermann/wradlib,kmuehlbauer/wradlib,heistermann/wradlib,wradlib/wradlib