Delete til directory if it exists before copying HTML files to it

[sdthaker]

As far as I know, the instructions tell us to delete the existing til directory before copying contents into it. After running the tool and passing a text file, it successfully generated the HTML and put it into the til dir, but all the existing HTML files were still present in til directory. I believe this should be an easy fix. Check to find if the til directory exists, if it does then remove it.

From the 0.1 Release Wiki Document:

[omalk98]

The program is designed to overwrite files with the same input path instead of clearing the entire directory, this is done simple for ease of updating the HTML files as well as allowing for incremental addition of HTML files.

In case notes get sparse and numerous, this design should help keep all notes easily updated in a non destructive way.

It also improves performance as it does not require clearing the entire directory before adding new files, and will allows notes to be anywhere in file system instead of forcing them all to be in one place to be compiled each time a new note is added.