VBENCH: rename parser.py to parser_vb.py
BUG: fix broken df.info() test_info_duplicate_columns
DOC: add a couple plt.close('all') to avoid warning
DOC: fix warning + some stylistic corrections
Modified test_pow function in computation/tests/test_eval.py to use assert_allclose rather than assert_all_equal to avoid machine precision failures in TestEvalNumexprPandas/Numpy.  Fixes issue #5981.
Merge pull request #5979 from y-p/PR_VB_parser_rename

VBENCH: rename parser.py to parser_vb.py
Merge pull request #5980 from jorisvandenbossche/doc-plot-warning

DOC: add a couple plt.close('all') to avoid warning
DOC: correction of docstring dtypes/ftypes
Merge pull request #5982 from drudd/master

Modified test_pow function in computation/tests/test_eval.py to use asse...
Merge pull request #5984 from jorisvandenbossche/doc-dtypes

DOC: correction of docstring dtypes/ftypes
API: Panel.dtypes to use generic method; add tests for Panel4D for same

DOC: updated api docs for panel/panel4d
DOC: in ReST, a sublabel defines it's parent. latex complains of dupe
Merge pull request #5985 from y-p/PR_doc_latex_fix

DOC: in ReST, a sublabel defines it's parent. latex complains of dupe
Merge pull request #5983 from jreback/panel_dtypes

API: Panel.dtypes to use generic method; add tests for Panel4D for same
DOC: add 0.13.1 whatsnew to the index
checkin of percentile rank