(#477) - Fix race condition in db.changes
Merge pull request #520 from adampolak/477-fix-race-condition

(#477) - Fix race condition in db.changes
(#533) - Lock levelup version
Merge pull request #534 from daleharvey/533-lock-levelup

(#533) - Lock levelup version
(#531) - Correct idb typo in WebSQL adapter
Merge pull request #532 from daleharvey/531-fix-websql

(#531) - Correct idb typo in WebSQL adapter
Revert "Merge pull request #528 from benrudolph/task-queue"

This reverts commit e0a0b37a8224f49cd9c1c8598ed8d8ab90d21426, reversing
changes made to 2904b8745c7ccf3b54069a8eeff80388b3f9fccc.
Revert changes to pouch.js by task queue
Merge branch 'master' into 19-all_dbs-method

Conflicts:
	src/pouch.js