Improved Repository Setup

[ivanzvonkov]

What changed:

• Wrote additional instructions about setting up environment and processing data
• Added environment yml with strict package versions
• Added Tensorboard for logging loss
• Cleaned up dvg.py so that it requires minimal changes on setup

Why

• This PR makes it easier to set up the repository and train a model with KTH data

[ivanzvonkov]

@shgaurav1 did you have a chance to look at this?