Added Logging to files

Bot now logs messages in channel (including join and part) in Log.txt
and PMs to the bot in PM Log.txt.
Revert "Added Logging to files"

This reverts commit e3c65877b368ac5c8046592bcbbc310231b1ef12.
Revert "Revert "Added Logging to files""

This reverts commit f0f243b095544a7f316a27d1d0d81ce53bd47423.