[osis-core] scope attribute on <p>, <lg>, <list>, and <table>

[Todd Tillinghast]

In talking with a group attempting to use OSIS documents within
Documentum they are struggling with the fact that Bibles and thus OSIS
documents have multiple overlapping hierarchies which is a problem with
Documentum's architecture that requires that documents be broken in to
"chunks".

The best solution will like be for them to "chunk" OSIS documents at the
<p>, <lg>, <list>, <table> level.  Because the common access pattern is
likely to be based on Book/Chapter/Verse reference it would be handy if
the "scope" attribute were available on these elements in the same way
it is with <div>.

Any objections to or reasons why we should not add "scope" to "large"
containers (<p>, <lg>, <list>, <table>, <speech> and possibly <signed>
and <salute>)?

Todd