First beta update

Hello again! Partial update here.

• Corrected some typos
• Fixed some inconsistencies
• Replaced some images with revised versions

On that last point, I'm still working to go through the entire image catalogue and unify the style/coloring. I honestly prefer some of the messier earlier images (they're fun!), but remain convinced everyone should have the same eye colors and whatnot throughout the project. ;)

Happy dragon riding!