breakout node-data src and add tests

allow node data to initialize from DOM

skip Y.instanceOf check

make testSelf arg optional; add unit tests

roll stopFn arg into Node::ancestor(s)

add stopFn support

Fixes #2530913 - Minor doc tweaks Added @main tags to modules that YUIDoc failed to find the proper main module description. No build was done, only modified source files.

Remove "Y." from @param and @return types yuidoc doesn't link class types that start with "Y."

Ensure that Y.all is documented on the YUI class.

skip caching document fragment

API doc tweaks to get Node/NodeList items displayed in the correct places and under the correct modules.

break out node-core