[TxMt] Markdown typing pairs

[Rob McBroom]

I guess this is a two-part question:

   1. Why weren't `<` and `>` included as a smartTypingPair for  
Markdown? Since
   those are the characters used to surround in-line URLs that should  
become
   clickable links, it seems like it should be there so you could  
just highlight
   a URL and type `<`. This seems pretty obvious though, so maybe  
this pair was
   omitted intentionally for some reason I haven't caught onto?

   2. Since the scope in Markdown includes `text.html`, why doesn't  
that pair
   get pulled from the HTML bundle's preferences? Is it because there  
are
   explicitly defined pairs for a more specific scope in this case
   (`text.html.markdown`)?

Just curious. Thanks.

Rob