Make sure the file exists before trying to upload. Refactor code a bit. Implement non-blocking server and threaded uploads

Add the ability to pick location of match video files. Update test suite. Refactor various parts of the code.

Hot fix a few parts of the code. Main focus being on bug fixes and string fixes. New call from TBA for event type to be added to description, makes the line a bit wordy but still good to have. Also made scripts executable with just script_name.py in CLI.

Some cleanup and big changes to README. New extra script for retroactively updating descriptions with match data.

Eliminated CLI interface in favor of web.py based web GUI. Check README for more information.

Includes batch uploading functionality and cleans up code a bit more.

This script is complete with all the features necessary for completing uploads of a FRC matches to YouTube.