Separated keyword sets for different subplot types of scatter_matrix.
Updated RELEASE.rst to note modifications closing #3267
TST: unit test for #3503
DOC: fix read_html attribute reading example
Merge pull request #3732 from cpcloud/read-html-docs-fix

DOC: fix read_html attribute reading example
BLD: refactoring in test_perf
BLD: make affinity optional, and reduce user message drama
BUG/BLD: pytables version checking was incorrect
BLD: test_perf.py, add --base-pickle --target-pickle options to test_perf
Merge pull request #3734 from y-p/PR_test_perf_pickle_compare

 BLD: test_perf.py, add --base-pickle --target-pickle options to test_perf
CLN: remove spurious print
Merge pull request #3735 from cpcloud/fix-travis-bug

BUG/BLD: pytables version checking was incorrect
PERF: (GH3733) where block splitting now done in at most 2 blocks rather than

      item-by-item; add vb_suite tests for masking
BUG: _interleave now returns an lcd of int64 or 2 x the intsize if

     uints are seen
Merge pull request #3736 from jreback/mask_slow

PERF: speed up where operations when splitting blocks (GH3733)
TST: Fix assert_almost_equal error message

Most tests are of form assert_almost_equal(result, expected).  Verbose
error message was treating its first argument as expected, this is now
fixed.
Merge pull request #3694 from pydata/PR-test-3503

Test to verify/fix behavior in #3503
REF: promote parser.pyx into top level
CLN: remove sandbox cruft
BUG: fix _parser->parser import (sorry)