Re-add try-except check around call to reader.read_data_section_iterative()

[dcslagel]

Description:

This pull-request is a finding from reviewing read_file_contents() for removal. It adds back a try check around reader.read_data_section_iterative(). This try also re-enables Cntrl-C via raising a KeyboardInterrupt exception.
For reference, the original commits were: 2d9e43c and e960998.

I think we still want this code, but not 100% sure. :-)

Test Results

The test results with or without this change are the same. There isn't test coverage for it at this time.

Name                       Stmts   Miss  Cover
----------------------------------------------
lasio/__init__.py             13      2    85%
lasio/convert_version.py      20     20     0%
lasio/defaults.py             11      0   100%
lasio/examples.py             42     10    76%
lasio/excel.py                88     34    61%
lasio/exceptions.py            6      0   100%
lasio/las.py                 389     59    85%
lasio/las_items.py           190     31    84%
lasio/las_version.py          50     10    80%
lasio/reader.py              457     84    82%
lasio/writer.py              168      9    95%
----------------------------------------------
TOTAL                       1434    259    82%

Let me know if this change could be accepted (or rejected) or
needs some additional changes before being approved and merged.

Thank you,
DC

[dcslagel]

@kinverarity1,

Just checking on this pull-request. I think it is ready to merge, but let me know if it needs changes or is rejected.

Thanks,
DC

[kinverarity1]

Thank you @dcslagel