New features for pdf2txt

[jlownie]

Need to add the following functionality:

• Delete the file after uploading it

Consider adding the following features:

• Ability to download the text of a file already on Google Drive
• Use a library to extract text rather than Google

Also:

• Test what happens when I run this as another user - see how authentication works

[jlownie]

Added the file name as a parameter and used it to name the output

Also added logging