Allow null values for fields in batchInsert
Document commit 7ce4702 (Allow nulls in batchInsert) in CHANGELOG
Add getIsPjax method to Request
Add X-PJAX-URL header when redirect a pjax request
Merge pull request #2531 from tof06/master

Add getIsPjax method to Request, and add X-PJAX-URL header when redirect from pjax request
CS fix.
Merge pull request #2526 from skotos/master

nulls in batchInsert. Patch available.
CS fix.