Barebones release, with all neccessary functionality.

OK, so I have got everything finished for now. The program successfully take a .zip file of all of a team's channel conversations and outputs a PDF doc containing:

1. A Cover page with names of channel participants and channel names
2. Some graphs analysing Slack team activity
3. The conversation logs of all channels

The look of the PDF still needs to be improved, headers need to be added delineating channels, and the code needs a lot of restructuring. That's for version 1.1.