Can you provide HD Map coordinate encoding and decoding feature from this library

[kyooryoo]

According to the following HERE documentation, HERE HD Map use special encoding method for coordinates: https://developer.here.com/documentation/here-lanes/dev_guide/topics/hd-map-coordinate-encoding.html Can you add the feature for encoding and decoding the HERE HD Map coordinates such as follows:

def decode_here_2d_coordinate_int(encoded):
    encoded_bin = bin(int(encoded))[2:].rjust(64, '0')
    lon_bin = encoded_bin[1::2]
    lat_bin = encoded_bin[2::2]
    lat_bin = lat_bin.rjust(32, lat_bin[0])
    lon_uint = int(lon_bin, base=2)
    lat_uint = int(lat_bin, base=2)
    lon_int = struct.unpack('i', struct.pack('I', lon_uint))[0]
    lat_int = struct.unpack('i', struct.pack('I', lat_uint))[0]
    return lat_int, lon_int

def decode_here_2d_coordinate_diffs_offset(encoded_diffs, encoded_reference):
    coords = []
    #lat_int, lon_int = 0, 0
    lat_int, lon_int = decode_here_2d_coordinate_int(encoded_reference)
    for encoded in encoded_diffs:
        diff_lat_int, diff_lon_int = decode_here_2d_coordinate_int(encoded)
        lat_int ^= diff_lat_int
        lon_int ^= diff_lon_int
        lon_deg = lon_int * (360 / 2 ** 32)
        lat_deg = lat_int * (180 / 2 ** 31)
        coords.append((lat_deg, lon_deg))
    return coords

[abdullahselek]

@kyooryoo sorry for my late reply but I have so much got to do with other stuff, please feel free to open a PR with your suggested changes.