Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Expose _serialize as stringify, for consistency with Y.QueryString
modify api so Y.IO.stringify('#my-form') works
improve argument names and docs
fix typo
make options optional
avoid Y.Lang
clarify code
Stubbed-in some io-form serialization tests.
Merge pull request #1 from ericf/io-serialize

Stubbed-in some io-form serialization tests.
Fix #2532983.
Remove trailing whitespace.
Build tabview.
Remove unused arguments.
Remove unused functions.
Build tabview.
Remove trailing whitespace.
Remove unused argument.
Use === to avoid lint warnings for typeof testing.