* As an optimization for creation and initial population of a ShadowRoot, adds the optional `upgrade` static method. Note, the `fragment` dom must already have any necessary style scoping applied.

* Also removes initial default property sets from `ShadyData` and `ShadyRoot` which is empirically slightly faster.

* slightly optimizes capturing logical data by not accessing `childNodes`

This replaces but is the same as `ShadowRoot.upgrade`. Prefer putting bespoke API on non-standard object.

Also adds some slight type refinement.

Remove`.only` that was mistakenly skipping tests. Slight re-organization of a few tests

Since `appendChild` is not used, the custom elements patch that calls `connectedCallback` will not run. Therefore, do not use this when custom elements are being polyfilled.

Performing `appendChild` with a documentFragment with a patched prototype appears to blow up IE.

This requires making sure `attachShadow` and `appendChild` are called. The code now special cases inside of those patches.

* ensures a shadowRoot itself does not maintain a `__noInsertionPoint` flag after initial creation when ShadyDOM.attachDom is used.
* adds small optimization to prevent text nodes from being unscoped

…nt options.

…agment})`