Added support for csv file dir path & added watch time to logging

[Jordiejam]

I initially put the directory path of the files into the config.json assuming that the program would identify the correct file for me (I didn't know which were the correct files at the time). It threw an error, so I went in and added some code to check whether a dir path was entered and if so try to identify the correct files. It still throws an error if it can't.

I also wanted some additional info in the log about when the show had been watched (out of interest) so I added that into the logging too.