Caught some typos. Made units separate from the numbers 1GHz -> 1 GHz
after talking to Nick about questions of style (this has the side effect of making future spell checking easier).
It's not clear today that `destination` *always* is a directory, and never a destination file
I've been bitten by this multiple times, as the docs today seem like it's possible to download remote file `x` and put it in dir `y` *and* rename the file to `z`
I apologize in advance for the rather long PR, but unfortunately there
is not an easy way to break this up into smaller chunks. This separates
the agent configuration into smaller, more consumable pieces just like
the job specification.
