ENH: introduced missing keyword to read_RADOLAN_composite.
To avoid hardcoded values as much as possible

ENH: made parsing of header info more independent from individual locations
(as recommended in the latest RADOLAN composite format documentation [v2.2.2])

MIN: Some code beautifications

ENH: changed print statements inside read_RADOLAN_composite to warnings

FIX: added radar height to final altitude

DOC: Updated doctests for polar2latlonalt and polar2latlonalt_n

FIX: hammered out one big bug

ENH: made call signature of polar2latlonalt_n similar to that of polar2latlonalt

FIX: moved conversion of angles from degrees to radians, so that behavior is
more intuitive (working with degrees on the user side, and thus actually
following the documentation).

ENH: Introduced polar2latlonalt_n and helper functions.
calculates geographical (sphere based) coordinates from radar coordinates,
taking both earth's curvature and the refraction of radar beams in the air
into account.

wradlib/wradlib mit default zusammengeführt

FIX: added conversion to 32-bit int for RX-data, because otherwise the data type
of the array would not be sufficient to store -9999 nodata values.

DOC: minor fixes

FIX: Fixed wrong datetime interpretation in RADOLAN composite and added new 150 km radius.

MIN: Trying to make MFB adjustment more robust.

Before an adjusment facator is computed, we fit a linear regression and evaluate
slope, p-value and correlation. We compute an adjustment factor only if a
strong relationship is indicated (slope > 0.1, r > 0.5, p < 0.01)....

MIN: removed the range_lim argument from read_EDGE_netcdf.

Limiting the range is something tpo be done outsode the reading function.
Now, the entire range is returned.

MIN: Introducing exception handling for reading input files in read_EDGE_netcdf.

The aim is to at least close files if an error occus during reading,
using try except finally. This might be a model for all input functions. The
exception will be raised (or can be caught outside the function), but the file will...

FIX: Passing range length to sub-functions within process_raw_phidp2.

wradlib/wradlib mit default zusammengeführt

ENH: Added new functions for PhiDP reconstruction based on Vulpiani (2012).

The functions involve unfold_phidp_2 and a new convenience function process_raw_phidp2.

Once we know more about the behaviour of these function, it will be time to clean
up the dp module a little.