+ Add colored console logging
+ Add file logging
+ Refactor code
+ Add `--log-level` argument
+ Moved constant variables to separate file
+ Renamed some variables to be consistent throughout the program (`concurrent_connections` -> `concurrent_downloads`, `access_token` -> `bearer_token`)
+ If a keyfile isnt detected, we only warn the user instead of warning and exiting
+ External links are now written to their own shortcut file (they are still written to a single file still also) (#26)
+ Arguments `load-from-file` and `save-to-file` are no longer suppressed
+ Added Quiz URL
+ bump version
