MIN: slight changes in function to_hdf5 to allow appending data to existing hdf5 file
MIN: slight changes in function to_hdf5 to allow appending data to existing hdf5 file

some typos and docstring changes

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