Implementation of Unit Testing, IoC and DI

[Bidthedog]

Placeholder PR for a number of fairly major changes:

• Implemented Jasmine Unit Testing framework as per #2. Also created a few unit tests to get us started.
• Added Awilix IoC container as per #2
• Refactored most classes to take advantage of IoC
• Added logging abstraction as per #4 ready for full logging implementation
• Abstracted MariaDB persistence as per #5
• Updated node docker image to only restore dependencies (not new devDependencies)
• Added a number of new node tasks in package.json to help with development
• Changed bot bootstrapping code to use the IoC container
• Added strict mode execution to all scripts
• Added a lot more logging
• Added timestamps to all logs

This is currently a work in progress, so I have created a draft PR for now - please don't merge yet!

I'd recommend squashing this PR into one commit once ready.

[Bidthedog]

Fully tested and working. Also added the missing index.js file that you deleted in your last commit.

I rebased on your repo and force-pushed to my branch, so it should be fine when you PR + pull master.

This PR resolves #6, #5 and sets the foundation for #4 and #2.