reindex multi-index at level with reordered labels
BUG: Fix Datareader dtypes if there are missing values from Google.
Merge pull request #9025 from dstephens99/issue8980

BUG: Fix Datareader dtypes if there are missing values from Google.
Merge pull request #9019 from behzadnouri/mi-reidx

reindex multi-index at level with reordered labels
Add test for multiple columns
Do not test dates as it clutters the test
Implement timedeltas in to_json
Just get out the int value
Fix up some tests around json
Need aslong for py3
Do our own seconds conversion in python26