[osis-core] Quotes of scripture in an OSIS document that is NOT a Bible.

[Todd Tillinghast]

In OSIS documents that are not Bibles, it is a common to see a quote of
scripture text followed by the reference.  

Does it make sense to add an optional osisRef attribute to <q> and
<milestoneStart> to accommodate this frequent issue?

Example:
<q  osisRef="Matt.20.28">The Son of Man did not come to be served, but
to serve . . . </q>

rather than 
<q>The Son of Man did not come to be served, but to serve . .
.<reference osisRef="Matt.20.28">Matthew  20:28</reference></q>

Todd