Fix commas in config.json

The config.json file was missing commas and would cause the python
script to barf. I have changed the placeholders as well. I will adjust
them again later after I create an instruction guide.
Add message to log.

Previously the logger only recorded the date and time. Now, it also
outputs a message. I'm not familiar enough with logging to improve it
further. I'll mess with it more as I go along.
Add vim temporary file types to .gitignore.
Add slightly more detail to install doc.

The install doc was on the TODO. It has some very basic instructions
now. It should be enough to get someone started, but it doesn't look
great.