Provides a link to the list of encoding in Python

Better links

Added link to standard encodings in io html documentation

Removed link to Python2 documentations and left link to Python3 only
Merge pull request #8125 from dxshank/dev-update-read-csv-docs

DOC: Link to Python standard encodings from read_csv documentation
DOC: v0.15.0 for GH8226
ENH: TimedeltaIndex and Timedelta scalar support (GH3009)

BUG: coercion of timedeltas in assignment (GH8209)

TST: skip sql.timedelta tests for now

COMPAT: provide conversion for passing in non-ns datetime64/timedelta64

BUG: diff on Dataframe with timedelta64 broken (GH4533)

ENH: support for alternate Timedelta format constructors in natural language (GH8190)