General cleanup

[Why-Ay-Es-Haitch]

Some small general cleanup of code including:

• Removal of all unnecessary imports
• Creation of data loader to load training and testing datasets, now these methods are called instead of duplicated code as per DRY
• Moved the RNN to an architectures subfolder. All architectures can be kept here for easier visibility.

Changes aren't perfect, but they do make the code way easier to read for anyone coming into the project.