Updating the source version to 1.9.1pre
Fix #13183: Wrong animation initial value calc. Close gh-1136.
Fix #13208: only check elements for delegation matches
Fix #13182: update Sizzle
No ticket: improve replaceWith testing
Fix #13233: re-allow .replaceWith of text nodes. Close gh-1137.
Fix #8335: Avoid memory leak by never setting data on non-element non-document nodes. Ref gh-1127.
(cherry picked from commit cc324abf739669bd2a4669742c994b86c4ad467b)
Ref 8f72967e: use acceptData to determine when it is safe to add event handlers
(cherry picked from commit 50290b8ffb05c504d3866a619f282bf795bc01f6)
Fix jQuery #13251: use slice instead of substring
Update Sizzle: fixes native slice usage
Fix broken link in CONTRIBUTING.md, close gh-1132.
Fix requirements and dependencies in README, close gh-1131.
Never use the XML as parsed by the XHR instance. Use raw text instead and let the ajax conversion logic do the trick. -20 min/gzipped. Fixes #13276. Unit test added.
Treat elements as hidden when either offsetWidth OR offsetHeight is 0. Fixes #13132, #10406.
Fix failing tests, add support for empty spans in Opera. Supplements #13132, #10406.
Ignore file inputs when serializing forms. File input serialization is handled by plugins. Fixes #13306.
Don't try and convert data for 204 No Content responses. Fixes #13292. Fixes #13261.
Fix #13315: compare typeof node.method to var instead of literal "undefined" for safer uglification
Fix #13281: update Sizzle
Fix #13274: Wrap sourceMap directive in multiline comments. Close gh-1143.