Refactor: change how we scale graphics for different resolutions.

We now use love.graphics.scale() instead of scaling manually.
Change loveframes to handle mouse input correctly with our new resolution system.
Use larger fonts for our PotB skin.
Tweak black serpent's attack
Fix rendering of left sidebar.
You can now visit the storyboard from the main menu.
Make clickzone font larger
Refactor: Move story data from storyboard to story module.
Fix incorrect storypart descriptions
Fix bug with full screen fade not covering the entire screen.
Add completeness-based status colors to the storyboard.