(#136) - Fix "#3136 style=all_docs" against CouchDB 2.0

The _changes feed does not guarantee order so remove this assertion.
(#136) - Skip large doc_ids tests against CouchDB 2.0

CouchDB 2.0 does not (yet) support POST requests to _changes.
Re-enable when https://issues.apache.org/jira/browse/COUCHDB-2530 is fixed.
(#3251) - add read queue to avoid leveldb corruption
(#136) - Fix "#3136 style=all_docs & include_docs" against CouchDB 2.0

_changes feed does not guarantee order so remove this assertion.
(#3278) - Add hasOwnProperty check for IE11
(#3281) - refactor websql

Also moved http.js to http/http.js for consistency.

Also finally got rid of the need to manually add ok=true
for `bulkDocs`'s _local responses; `utils.processDocs` now
handles that.