update apidoc for `previous` and `next`
update and also modify the `elementByAxis`
[io] Check whether a form still exists before resetting it

IO clears the form content on end, but if the caller removed the form soon
after it was called, this fails at a removeAttribute on part of the, now
non-existent form content.

We should check that the form exists before attempting to reset it.
IO: Build.
Merge branch 'live-docs' into dev-master
Build files for dom and node.
Fix node-scroll-info inaccuracy in Chrome for Android. Fixes #1483
Build node-scroll-info.
YUI and Loader build for latest Gallery build