elements and markup for word breaks (original issue)

[emylonas]

<supplied. as part of a word When the supplied element has no space between it and a text node, then it's part of the same word. It is INSIDE the <w> element. <supplied> should always be inside the <w>.

 <p>Ἐπ’ ἱερέως <w>Θρασυδ<supplied reason="lost">άμου</supplied></w>
               <lb/><w>Δαλ<supplied reason="lost">ίου</supplied></w>
            </p>

<supplied> with multiple or partial words in it.

ἁγ<supplied reason="lost">ίῳ τόπῳ προσήνεγκ</supplied>
<lb break="no"/>α

<w>ἁγ<supplied reason="lost">ίῳ</supplied></w> <w><supplied reason="lost">τόπῳ</supplied></w> <w><supplied reason="lost">προσήνεγκ</supplied>
               <lb break="no"/>α</w>

<gap>
throw gaps away. But words following them have two different treatments

1. if there is a space after the gap, it's business as usual.
2. if there is no space after gap

<gap reason="lost" extent="unknown" unit="character"/>ου

<gap reason="lost" extent="unknown" unit="character"/><w type="partial">ου</w>
``

Also `orig` with parent `<p>` and not a child of `<choice>`, deep copy. with the tag.
Same for `<num>` 

`<unclear>` always is part of a word. keep it inside `<w>`

**spaces:** interword spaces don't need to be preserved as far as we know.

**what the id should look like.** 
aaaa0000-l-w where `l` is the line number and `w` is the word in the line