Now stores easily-editable files in source/ subdir. 

I'm still in the process of testing this out for bugs, but this is something I thought bashblog needed. After publishing, the blogger is left with only the generated html files and has to edit those if he makes a spelling mistake or anything. Now it basically stores the temporary file in the source/ subdirectory with the same title as the generated html file.

Tested lightly while using markdown.

Possible issues:

* may not work the same when not using markdown for some reason.
* nothing stopping blogger to publish --> edit from source --> save as draft --> accidentally republish with a different title. Maybe a safeguard needs to be in place to stop saving as a draft.
* more than likely other things

I also updated version numbers in the changelog. If you don't appreciate that or I shouldn't have, let me know.