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.
Fix #13316. Use minified version in unit testing.

Also migrates the XHR check added to 2.0 in 62acda819f9b6fba9263d0b613e15285807b23a7.
Fix build until next grunt rc, disable compare_size.
Fix #12846. Restore overflow when animation is stopped.

(Cherry picked from a6c358d)
Fix #12656. Make event shorthands excludable.
Fix #13150, .has() w/o args checks for any callbacks. Close gh-1111.
Update author list.