find: Improve wording

Fixes gh-395
Closes gh-423
Document escaping HTML, script injection. Fixes #23
Fix broken link to jQuery type in .add(), closes gh-320
Extend: Do not extend cyclical data structures, closes gh-332
Types: Clarify behavior of jQuery-object-returning methods, ref gh-338
CSS: Clarify computed style, closes gh-322
append() clones for all elements but the last one, not first. Closes #344
Update bind() - preventBubble argument is optional. Closes #416
Update is(). Argument can take more than one element. Closes #415
1.11.0
Update SOP note in notes.xsl. Closes #398
.get() and .toArray(): Remove "DOM" from description. Fixes gh-443.
1.11.1
parseHTML: Add security warning, closes gh-59
Dimensions: values are non-integer and unreliable zoomed. Fixes gh-76, gh-103
Note new sane 1.9+ behavior for disconnected elems, ref gh-240
Notes.xsl: Touch up note about manipulation of disconnected nodes
1.11.2
More emphasis about element order with .add() and jQuery()

Fixes gh-240
Closes #435
Fix broken links to docs.jquery.com.

Fixes gh-169
Closes #432