XML reader is skipping lines

[Matthew-Boyd]

The XML reader '_xml_to_dataframe()' in noaa.py is skipping every other line of data as it is assuming every line is duplicated (indicated by the TODO statements on lines 146 and 154). This however is at least not the case for the test 'test_request_noaa_data()' in noaa.py. Therefore, half the data is being omitted in the output dataframe.

Specifically, the response from the noaa query includes data at times:
00:04
00:10
00:28
00:34
00:46
...

but the output from the XML reader only includes the times:
00:04
00:28
00:46
...