Corrected issues with new RSS entry footer.

The RSS footer neede to be escaped for XML. The content is pass through the
`xml_escape` Liquid filter, but the hand coded rss_footer is not. Converted all
< to &lt;, > to &gt;, and " to &quot;.
link posting on credit card form JavaScript
Added --progress flag to rsync.

Curious about what progress will provide.
posting about building an rss feed for jekyll
Create link posting footer.

After getting a tweet from someone who thought one of my link style postings
was empty, I decided that something had to be added to make it more apparent
that the posting title is a link that leads to the actual content. Therefore I
created a small footer that is inserted at the end of link postings. It will
hopefully explain what I'm up to.
Updated post template and config.

Updated post template to make use of new link footer. And removed `--progress`
from rsync options. It's worse than verbose.