DOC: io.wb example
DOC: move data reader docs to Remote Data Access top-level section
TST: add basic clipboard test

Also add support for PySide
Merge pull request #4282 from cpcloud/add-clipboard-test

TST: add basic clipboard test
BUG: series timedelta arithmetic was not being converted to ns
TST/ENH: add test for subtraction
TST: add timedelta conversion in older numpy