This reverts commit 6d358c0c.

Makes prefilters and transport inspection more robust and uses better variable names for readability.

Revised internal implementation of ajaxPrefilter() and ajaxTransport(). Everything is shorter and more efficient now. Also fixes a couple spacing issues that remained.

Fixes some coding style issues in core.js. In jQuery.fn.ready(), simplifies the whole code (for better backward compatibility) and removes redefinition of the function itself (in order not to clash with proxying). Also, in jQuery.when(), removes unnecessary closure and early rejection test and makes use of then instead of done/fail (better interoperability).

Re-organizes ajax.js: prefilters and transports are no longer stored in ajaxSettings (their structure is not handled correctly by extend() and was causing some overhead when constructing the final options map in ajax()); base function for ajaxPrefilter and ajaxTransport has been renamed and split in two (one for inspection, one for addition); response/dataType determination and data conversion logics have been externalized from the ajax() internal callback; data conversion no longer sets responseXXX fields; some minor re-formatting and simplifications.

Merge branch 'fix-7398-frameset-docs' of https://github.com/dmethvin/jquery into dmethvin-fix-7398-frameset-docs

Revert "Make sure that focusin/focusout bubbles in non-IE browsers." This was causing problems with the focusin event, see: #7340.

This reverts commit 88068f82.

Conflicts:

	src/event.js
	test/unit/event.js

Replaces "text in-between" technique with a full-fledged one-level transitive search for converters (unit tests added). Also cleans up auto dataType determination and adds converter checks in order to guess the best dataType possible.

Merge branch 'fix-7853-add-context' of https://github.com/dmethvin/jquery into dmethvin-fix-7853-add-context

Moves determineResponse logic into main ajax callback. Puts responseXXX fields definitions into ajaxSettings.

Bring jQuery('#id') and jQuery('body') logic back into core (while leaving it in Sizzle at the same time). Was causing too much of a performance hit to leave it all to Sizzle.

Renames determineDataType as determineResponse. Makes it more generic as a first step into integrating the logic into the main ajax done callback. Also fixes some comments in ajax/xhr.js.

Move jQuery(...) selector speed-up logic into Sizzle(...) qSA handling. Additionally add in a new catch for Sizzle('.class') (avoid using qSA and use getElementsByClassName instead, where applicable).

Makes sure statusCode callbacks are ordered in the same way success and error callbacks are. Unit tests added.

Cleans up and simplifies code shared by ajaxPrefilter and ajaxTransport. Removes chainability of ajaxSetup, ajaxPrefilter and ajaxTransport. Also makes sure context is handled properly by ajaxSetup (unit test added).

Revised the Nokia support fallback. It turns out that Nokia supports the documentElement property but does not define document.compatMode. Adding this third fallback allows Nokia to run jQuery error-free and return proper values for window width and height.