Commits final batch of modifications

in todays commit:
* remove the "relation ship with offer answer" section and any
references to ICE descriptions. We are just talking about offers and
answers now. a lot clearer this way
* talk a bit more about how new candidates get exchanged
* add a short section about updated offers and answers
* a bunch of other less important changes

I will reply to ekr's mail during the weekend so that we can discuss
all of this and make sure we are ready for submisison.
Commits final batch of modifications

in todays episode:
    * remove the "relation ship with offer answer" section and any
references to ICE descriptions. We are just talking about offers and
answers now. a lot clearer this way
    * talk a bit more about how new candidates get exchanged
    * add a short section about updated offers and answers
    * a bunch of other less important changes

    I will reply to Eric's mail during the weekend so that we can
discuss all of this and make sure we are ready for submisison.