Tree Construction: do not use phase-specific handling for implied end-tag tokens emitted during InBody phase

[jayaddison]

The InBodyPhase parser phase creates and processes implied close-tag tokens for a small number of stopNames elements.

This changeset updates the phase's logic so that processing of these implied tokens remains within the InBody parser phase.

This fixes #111 by avoiding a call to the phase-specific InTablePhase.endTagOther to handle the implied end-tag, which as a side-effect disables the insertFromTable flag. That flag must remain True in order for repositioning of fostered elements relative to a <table> tag to be performed correctly.

[jayaddison]

Cleaning up some old / stale pull requests; please let me know if this changeset is considered worthwhile and I'll reopen if so.