Update to general-org.el and capture-templates.el

Tried adding support for the via property using javascript
document.referrer. Still trying to figure out how to pass that
information to org-protocol. It looks like I'm going to have to write my
own sub-protocol to deal with this information.

Also seems extraneous to be pinging the readability so many time; it
would be better to ping it once and save the data.

Eventually my/get-via will format links based on URL for common things
like Hacker News, Reddit, Google Searches, etc.