FIX: Bug in stata parser causing failure when reading dataset with string data
DOC add to_datetime to api.rst
WIP some to_datetime docs additions
WIP to_datetime docs more rewriting
FIX final tweaks
CLN/DOC: convert GH* issue mentions to the extlinks version
ENH add cython tutorial
FIX add cython to toctree
CLN/DOC: move release notes to docs
CLN: remove ability to refer to pull requests by sphinx roles
CLN/DOC: change links to release notes in CONTRIBUTING and whatnews
CLN: remove :hidden: and change release to markdown
Merge pull request #3961 from cpcloud/github-issue-sphinxext

DOC/CLN: remove gh links and use the new issue format for whatsnew
CLN: fix grammar in extract_index error message
TST: update test to reflect error message change
Merge pull request #3972 from cpcloud/fix-error-msg

CLN: fix grammar in extract_index error message
DOC: put release notes link to dev until 0.11.1 is released
FIX remove todos

change name to Enhancing performance
add in some sections
Merge pull request #3859 from hayd/DOC_add_to_datetime

DOC add to_datetime to api.rst
GH3969 Implement unit='D' in to_datetime