API: Deprecate skip_footer in read_csv
Title is self-explanatory.

Closes gh-13349 and partially undoes this <a href="https://github.com/pydata/pandas/commit/9ceea2fd46e79f37269a32de8c140cddf90eda13">commit</a> back in `v0.9.0`.  With such a massive API now, having duplicate arguments makes managing it way less practical.
