DOC: add way to document DatetimeIndex field attributes
+ doc for month and dayofweek
Merge pull request #5812 from spencerlyon2/yahooFinFix

BUG: Yahoo finance changed chart base url. Updated _get_hist_yahoo
PERF: perf issue with dropna on frame
Merge pull request #5815 from jreback/dropna_perf

PERF: perf issue with dropna on frame
CLN: Make io/data urls easier to monkey-patch
BUG: dropna dtype comp issue related (GH5815)
Merge pull request #5820 from jreback/perf_dropna_fix

BUG: dropna dtype comp issue related (GH5815)
bug fix for issue 5797
Merge pull request #5814 from jorisvandenbossche/doc-dtindex-attribute

DOC: add way to document DatetimeIndex field attributes
Merge pull request #5806 from MichaelWS/master

BUG: Series replace values using timestamps in a dict GH5797
Merge pull request #5817 from jtratner/make-urls-globals

CLN: Make io/data urls easier to monkey-patch
Merge pull request #5733 from nmichaud/read_table_prefix_fix

Fix prefix argument for read_csv/read_table
DOC: update release notes for GH5733
DOC: add pandas-xlsxwriter-charts ipnb to cookbook
DOC: add 'pandas ecosystem' section to docs
Merge pull request #5829 from y-p/PR_ecosystem

DOC: add 'pandas ecosystem' section to docs
Merge pull request #5828 from y-p/PR_excel_plots_cookbook

DOC: add pandas-xlsxwriter-charts ipnb to cookbook
DOC: grammer
DOC: change doc refs to 0.13.1
DOC: Add example to extract docstring, and explain change to match more clearly