BUG: pivot_table bug when rows is unspecified #3361
BLD: add system info line to ci/print_versions.py
TST: add a warning about required sm version in testWLS.
BLD: ci/print_versions reports  LC_ALL, LANG
BLD: test_perf, print stats as table
TST: convert unintended test description into comment
BLD: test_perf don't print stats twice
DOC: Moved note about cursor position in time series plots out of changes to pd.data.io.Options in v0.11.0
Merge pull request #3365 from spencerlyon2/DOCwhatsnew

DOC: Moved note about cursor position in TS plots out of changes to pd.data.io.Options in v0.11.0
BLD: use_build_cache.sh learned --force-overwrite and --debug
BLD: ci/print_versions.py, LC_ALL/LANG should default None
DOC: tweak deprecations message for display.line_width
Revert "BLD: ci/print_versions.py, LC_ALL/LANG should default None"

This reverts commit b9ca0ed1a5b44cd4c9983fd5ef64977ccb74e685.
BLD: ci/print_versions.py, LC_ALL/LANG should default to None
DOC: show the rplot import at the top level of the trellis plotting section
DOC: tweak docstring
CLN: elminate testing warning on 2.6, deprecated exception idiom
fix multiindex xs slicing bug
VB: add vbench for df.xs across row/col
BLD: travis network cache